feat(client): redesign frontend with TailwindCSS v4

Replace inline styles with TailwindCSS, implementing a cohesive Japanese-inspired
design system with custom colors (cream, teal primary), typography (Fraunces,
DM Sans), and animations. Update all pages and components with consistent styling,
improve accessibility by adding aria-hidden to decorative SVGs, and configure
Biome for Tailwind CSS syntax support.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

14 files changed, 617 insertions, 589 deletions

diff --git a/src/client/components/CreateCardModal.test.tsx b/src/client/components/CreateCardModal.test.tsx
index 6b429c8..7244824 100644
--- a/src/client/components/CreateCardModal.test.tsx
+++ b/src/client/components/CreateCardModal.test.tsx
@@ -84,7 +84,7 @@ describe("CreateCardModal", () => {
 		expect(screen.getByLabelText("Front")).toBeDefined();
 		expect(screen.getByLabelText("Back")).toBeDefined();
 		expect(screen.getByRole("button", { name: "Cancel" })).toBeDefined();
-		expect(screen.getByRole("button", { name: "Create" })).toBeDefined();
+		expect(screen.getByRole("button", { name: "Create Card" })).toBeDefined();
 	});
 
 	it("disables create button when front is empty", async () => {
@@ -93,7 +93,7 @@ describe("CreateCardModal", () => {
 
 		await user.type(screen.getByLabelText("Back"), "Answer");
 
-		const createButton = screen.getByRole("button", { name: "Create" });
+		const createButton = screen.getByRole("button", { name: "Create Card" });
 		expect(createButton).toHaveProperty("disabled", true);
 	});
 
@@ -103,7 +103,7 @@ describe("CreateCardModal", () => {
 
 		await user.type(screen.getByLabelText("Front"), "Question");
 
-		const createButton = screen.getByRole("button", { name: "Create" });
+		const createButton = screen.getByRole("button", { name: "Create Card" });
 		expect(createButton).toHaveProperty("disabled", true);
 	});
 
@@ -114,7 +114,7 @@ describe("CreateCardModal", () => {
 		await user.type(screen.getByLabelText("Front"), "Question");
 		await user.type(screen.getByLabelText("Back"), "Answer");
 
-		const createButton = screen.getByRole("button", { name: "Create" });
+		const createButton = screen.getByRole("button", { name: "Create Card" });
 		expect(createButton).toHaveProperty("disabled", false);
 	});
 
@@ -181,7 +181,7 @@ describe("CreateCardModal", () => {
 
 		await user.type(screen.getByLabelText("Front"), "What is 2+2?");
 		await user.type(screen.getByLabelText("Back"), "4");
-		await user.click(screen.getByRole("button", { name: "Create" }));
+		await user.click(screen.getByRole("button", { name: "Create Card" }));
 
 		await waitFor(() => {
 			expect(
@@ -213,7 +213,7 @@ describe("CreateCardModal", () => {
 
 		await user.type(screen.getByLabelText("Front"), "  Question  ");
 		await user.type(screen.getByLabelText("Back"), "  Answer  ");
-		await user.click(screen.getByRole("button", { name: "Create" }));
+		await user.click(screen.getByRole("button", { name: "Create Card" }));
 
 		await waitFor(() => {
 			expect(
@@ -241,7 +241,7 @@ describe("CreateCardModal", () => {
 
 		await user.type(screen.getByLabelText("Front"), "Question");
 		await user.type(screen.getByLabelText("Back"), "Answer");
-		await user.click(screen.getByRole("button", { name: "Create" }));
+		await user.click(screen.getByRole("button", { name: "Create Card" }));
 
 		expect(screen.getByRole("button", { name: "Creating..." })).toBeDefined();
 		expect(screen.getByRole("button", { name: "Creating..." })).toHaveProperty(
@@ -271,7 +271,7 @@ describe("CreateCardModal", () => {
 
 		await user.type(screen.getByLabelText("Front"), "Question");
 		await user.type(screen.getByLabelText("Back"), "Answer");
-		await user.click(screen.getByRole("button", { name: "Create" }));
+		await user.click(screen.getByRole("button", { name: "Create Card" }));
 
 		await waitFor(() => {
 			expect(screen.getByRole("alert").textContent).toContain(
@@ -291,7 +291,7 @@ describe("CreateCardModal", () => {
 
 		await user.type(screen.getByLabelText("Front"), "Question");
 		await user.type(screen.getByLabelText("Back"), "Answer");
-		await user.click(screen.getByRole("button", { name: "Create" }));
+		await user.click(screen.getByRole("button", { name: "Create Card" }));
 
 		await waitFor(() => {
 			expect(screen.getByRole("alert").textContent).toContain(
@@ -358,7 +358,7 @@ describe("CreateCardModal", () => {
 		// Create a card
 		await user.type(screen.getByLabelText("Front"), "Question");
 		await user.type(screen.getByLabelText("Back"), "Answer");
-		await user.click(screen.getByRole("button", { name: "Create" }));
+		await user.click(screen.getByRole("button", { name: "Create Card" }));
 
 		await waitFor(() => {
 			expect(onClose).toHaveBeenCalled();
diff --git a/src/client/components/CreateCardModal.tsx b/src/client/components/CreateCardModal.tsx
index c28cf0f..3913e82 100644
--- a/src/client/components/CreateCardModal.tsx
+++ b/src/client/components/CreateCardModal.tsx
@@ -83,18 +83,7 @@ export function CreateCardModal({
 			role="dialog"
 			aria-modal="true"
 			aria-labelledby="create-card-title"
-			style={{
-				position: "fixed",
-				top: 0,
-				left: 0,
-				right: 0,
-				bottom: 0,
-				backgroundColor: "rgba(0, 0, 0, 0.5)",
-				display: "flex",
-				alignItems: "center",
-				justifyContent: "center",
-				zIndex: 1000,
-			}}
+			className="fixed inset-0 bg-ink/40 backdrop-blur-sm flex items-center justify-center z-50 p-4 animate-fade-in"
 			onClick={(e) => {
 				if (e.target === e.currentTarget) {
 					handleClose();
@@ -106,88 +95,82 @@ export function CreateCardModal({
 				}
 			}}
 		>
-			<div
-				style={{
-					backgroundColor: "white",
-					padding: "1.5rem",
-					borderRadius: "8px",
-					width: "100%",
-					maxWidth: "500px",
-					margin: "1rem",
-				}}
-			>
-				<h2 id="create-card-title" style={{ marginTop: 0 }}>
-					Create New Card
-				</h2>
+			<div className="bg-white rounded-2xl shadow-xl w-full max-w-lg animate-scale-in">
+				<div className="p-6">
+					<h2
+						id="create-card-title"
+						className="font-display text-xl font-medium text-ink mb-6"
+					>
+						Create New Card
+					</h2>
 
-				<form onSubmit={handleSubmit}>
-					{error && (
-						<div role="alert" style={{ color: "red", marginBottom: "1rem" }}>
-							{error}
-						</div>
-					)}
+					<form onSubmit={handleSubmit} className="space-y-4">
+						{error && (
+							<div
+								role="alert"
+								className="bg-error/5 text-error text-sm px-4 py-3 rounded-lg border border-error/20"
+							>
+								{error}
+							</div>
+						)}
 
-					<div style={{ marginBottom: "1rem" }}>
-						<label
-							htmlFor="card-front"
-							style={{ display: "block", marginBottom: "0.25rem" }}
-						>
-							Front
-						</label>
-						<textarea
-							id="card-front"
-							value={front}
-							onChange={(e) => setFront(e.target.value)}
-							required
-							disabled={isSubmitting}
-							rows={3}
-							placeholder="Question or prompt"
-							style={{
-								width: "100%",
-								boxSizing: "border-box",
-								resize: "vertical",
-							}}
-						/>
-					</div>
+						<div>
+							<label
+								htmlFor="card-front"
+								className="block text-sm font-medium text-slate mb-1.5"
+							>
+								Front
+							</label>
+							<textarea
+								id="card-front"
+								value={front}
+								onChange={(e) => setFront(e.target.value)}
+								required
+								disabled={isSubmitting}
+								rows={3}
+								placeholder="Question or prompt"
+								className="w-full px-4 py-2.5 bg-ivory border border-border rounded-lg text-slate placeholder-muted transition-all duration-200 hover:border-muted focus:border-primary focus:ring-2 focus:ring-primary/10 disabled:opacity-50 disabled:cursor-not-allowed resize-none"
+							/>
+						</div>
 
-					<div style={{ marginBottom: "1rem" }}>
-						<label
-							htmlFor="card-back"
-							style={{ display: "block", marginBottom: "0.25rem" }}
-						>
-							Back
-						</label>
-						<textarea
-							id="card-back"
-							value={back}
-							onChange={(e) => setBack(e.target.value)}
-							required
-							disabled={isSubmitting}
-							rows={3}
-							placeholder="Answer or explanation"
-							style={{
-								width: "100%",
-								boxSizing: "border-box",
-								resize: "vertical",
-							}}
-						/>
-					</div>
+						<div>
+							<label
+								htmlFor="card-back"
+								className="block text-sm font-medium text-slate mb-1.5"
+							>
+								Back
+							</label>
+							<textarea
+								id="card-back"
+								value={back}
+								onChange={(e) => setBack(e.target.value)}
+								required
+								disabled={isSubmitting}
+								rows={3}
+								placeholder="Answer or explanation"
+								className="w-full px-4 py-2.5 bg-ivory border border-border rounded-lg text-slate placeholder-muted transition-all duration-200 hover:border-muted focus:border-primary focus:ring-2 focus:ring-primary/10 disabled:opacity-50 disabled:cursor-not-allowed resize-none"
+							/>
+						</div>
 
-					<div
-						style={{
-							display: "flex",
-							gap: "0.5rem",
-							justifyContent: "flex-end",
-						}}
-					>
-						<button type="button" onClick={handleClose} disabled={isSubmitting}>
-							Cancel
-						</button>
-						<button type="submit" disabled={isSubmitting || !isFormValid}>
-							{isSubmitting ? "Creating..." : "Create"}
-						</button>
-					</div>
-				</form>
+						<div className="flex gap-3 justify-end pt-2">
+							<button
+								type="button"
+								onClick={handleClose}
+								disabled={isSubmitting}
+								className="px-4 py-2 text-slate hover:bg-ivory rounded-lg transition-colors disabled:opacity-50"
+							>
+								Cancel
+							</button>
+							<button
+								type="submit"
+								disabled={isSubmitting || !isFormValid}
+								className="px-4 py-2 bg-primary hover:bg-primary-dark text-white font-medium rounded-lg transition-all duration-200 disabled:opacity-50 disabled:cursor-not-allowed"
+							>
+								{isSubmitting ? "Creating..." : "Create Card"}
+							</button>
+						</div>
+					</form>
+				</div>
 			</div>
 		</div>
 	);
diff --git a/src/client/components/CreateDeckModal.test.tsx b/src/client/components/CreateDeckModal.test.tsx
index 984f6d0..cdc5f97 100644
--- a/src/client/components/CreateDeckModal.test.tsx
+++ b/src/client/components/CreateDeckModal.test.tsx
@@ -79,13 +79,13 @@ describe("CreateDeckModal", () => {
 		expect(screen.getByLabelText("Name")).toBeDefined();
 		expect(screen.getByLabelText("Description (optional)")).toBeDefined();
 		expect(screen.getByRole("button", { name: "Cancel" })).toBeDefined();
-		expect(screen.getByRole("button", { name: "Create" })).toBeDefined();
+		expect(screen.getByRole("button", { name: "Create Deck" })).toBeDefined();
 	});
 
 	it("disables create button when name is empty", () => {
 		render(<CreateDeckModal {...defaultProps} />);
 
-		const createButton = screen.getByRole("button", { name: "Create" });
+		const createButton = screen.getByRole("button", { name: "Create Deck" });
 		expect(createButton).toHaveProperty("disabled", true);
 	});
 
@@ -96,7 +96,7 @@ describe("CreateDeckModal", () => {
 		const nameInput = screen.getByLabelText("Name");
 		await user.type(nameInput, "My Deck");
 
-		const createButton = screen.getByRole("button", { name: "Create" });
+		const createButton = screen.getByRole("button", { name: "Create Deck" });
 		expect(createButton).toHaveProperty("disabled", false);
 	});
 
@@ -161,7 +161,7 @@ describe("CreateDeckModal", () => {
 		);
 
 		await user.type(screen.getByLabelText("Name"), "Test Deck");
-		await user.click(screen.getByRole("button", { name: "Create" }));
+		await user.click(screen.getByRole("button", { name: "Create Deck" }));
 
 		await waitFor(() => {
 			expect(apiClient.rpc.api.decks.$post).toHaveBeenCalledWith(
@@ -206,7 +206,7 @@ describe("CreateDeckModal", () => {
 			screen.getByLabelText("Description (optional)"),
 			"A test description",
 		);
-		await user.click(screen.getByRole("button", { name: "Create" }));
+		await user.click(screen.getByRole("button", { name: "Create Deck" }));
 
 		await waitFor(() => {
 			expect(apiClient.rpc.api.decks.$post).toHaveBeenCalledWith(
@@ -236,7 +236,7 @@ describe("CreateDeckModal", () => {
 			screen.getByLabelText("Description (optional)"),
 			"  Description  ",
 		);
-		await user.click(screen.getByRole("button", { name: "Create" }));
+		await user.click(screen.getByRole("button", { name: "Create Deck" }));
 
 		await waitFor(() => {
 			expect(apiClient.rpc.api.decks.$post).toHaveBeenCalledWith(
@@ -256,7 +256,7 @@ describe("CreateDeckModal", () => {
 		render(<CreateDeckModal {...defaultProps} />);
 
 		await user.type(screen.getByLabelText("Name"), "Test Deck");
-		await user.click(screen.getByRole("button", { name: "Create" }));
+		await user.click(screen.getByRole("button", { name: "Create Deck" }));
 
 		expect(screen.getByRole("button", { name: "Creating..." })).toBeDefined();
 		expect(screen.getByRole("button", { name: "Creating..." })).toHaveProperty(
@@ -288,7 +288,7 @@ describe("CreateDeckModal", () => {
 		render(<CreateDeckModal {...defaultProps} />);
 
 		await user.type(screen.getByLabelText("Name"), "Test Deck");
-		await user.click(screen.getByRole("button", { name: "Create" }));
+		await user.click(screen.getByRole("button", { name: "Create Deck" }));
 
 		await waitFor(() => {
 			expect(screen.getByRole("alert").textContent).toContain(
@@ -307,7 +307,7 @@ describe("CreateDeckModal", () => {
 		render(<CreateDeckModal {...defaultProps} />);
 
 		await user.type(screen.getByLabelText("Name"), "Test Deck");
-		await user.click(screen.getByRole("button", { name: "Create" }));
+		await user.click(screen.getByRole("button", { name: "Create Deck" }));
 
 		await waitFor(() => {
 			expect(screen.getByRole("alert").textContent).toContain(
@@ -376,7 +376,7 @@ describe("CreateDeckModal", () => {
 
 		// Create a deck
 		await user.type(screen.getByLabelText("Name"), "Test Deck");
-		await user.click(screen.getByRole("button", { name: "Create" }));
+		await user.click(screen.getByRole("button", { name: "Create Deck" }));
 
 		await waitFor(() => {
 			expect(onClose).toHaveBeenCalled();
diff --git a/src/client/components/CreateDeckModal.tsx b/src/client/components/CreateDeckModal.tsx
index 85afb0c..4541a68 100644
--- a/src/client/components/CreateDeckModal.tsx
+++ b/src/client/components/CreateDeckModal.tsx
@@ -78,18 +78,7 @@ export function CreateDeckModal({
 			role="dialog"
 			aria-modal="true"
 			aria-labelledby="create-deck-title"
-			style={{
-				position: "fixed",
-				top: 0,
-				left: 0,
-				right: 0,
-				bottom: 0,
-				backgroundColor: "rgba(0, 0, 0, 0.5)",
-				display: "flex",
-				alignItems: "center",
-				justifyContent: "center",
-				zIndex: 1000,
-			}}
+			className="fixed inset-0 bg-ink/40 backdrop-blur-sm flex items-center justify-center z-50 p-4 animate-fade-in"
 			onClick={(e) => {
 				if (e.target === e.currentTarget) {
 					handleClose();
@@ -101,83 +90,84 @@ export function CreateDeckModal({
 				}
 			}}
 		>
-			<div
-				style={{
-					backgroundColor: "white",
-					padding: "1.5rem",
-					borderRadius: "8px",
-					width: "100%",
-					maxWidth: "400px",
-					margin: "1rem",
-				}}
-			>
-				<h2 id="create-deck-title" style={{ marginTop: 0 }}>
-					Create New Deck
-				</h2>
+			<div className="bg-white rounded-2xl shadow-xl w-full max-w-md animate-scale-in">
+				<div className="p-6">
+					<h2
+						id="create-deck-title"
+						className="font-display text-xl font-medium text-ink mb-6"
+					>
+						Create New Deck
+					</h2>
 
-				<form onSubmit={handleSubmit}>
-					{error && (
-						<div role="alert" style={{ color: "red", marginBottom: "1rem" }}>
-							{error}
-						</div>
-					)}
+					<form onSubmit={handleSubmit} className="space-y-4">
+						{error && (
+							<div
+								role="alert"
+								className="bg-error/5 text-error text-sm px-4 py-3 rounded-lg border border-error/20"
+							>
+								{error}
+							</div>
+						)}
 
-					<div style={{ marginBottom: "1rem" }}>
-						<label
-							htmlFor="deck-name"
-							style={{ display: "block", marginBottom: "0.25rem" }}
-						>
-							Name
-						</label>
-						<input
-							id="deck-name"
-							type="text"
-							value={name}
-							onChange={(e) => setName(e.target.value)}
-							required
-							maxLength={255}
-							disabled={isSubmitting}
-							style={{ width: "100%", boxSizing: "border-box" }}
-						/>
-					</div>
+						<div>
+							<label
+								htmlFor="deck-name"
+								className="block text-sm font-medium text-slate mb-1.5"
+							>
+								Name
+							</label>
+							<input
+								id="deck-name"
+								type="text"
+								value={name}
+								onChange={(e) => setName(e.target.value)}
+								required
+								maxLength={255}
+								disabled={isSubmitting}
+								className="w-full px-4 py-2.5 bg-ivory border border-border rounded-lg text-slate placeholder-muted transition-all duration-200 hover:border-muted focus:border-primary focus:ring-2 focus:ring-primary/10 disabled:opacity-50 disabled:cursor-not-allowed"
+								placeholder="My New Deck"
+							/>
+						</div>
 
-					<div style={{ marginBottom: "1rem" }}>
-						<label
-							htmlFor="deck-description"
-							style={{ display: "block", marginBottom: "0.25rem" }}
-						>
-							Description (optional)
-						</label>
-						<textarea
-							id="deck-description"
-							value={description}
-							onChange={(e) => setDescription(e.target.value)}
-							maxLength={1000}
-							disabled={isSubmitting}
-							rows={3}
-							style={{
-								width: "100%",
-								boxSizing: "border-box",
-								resize: "vertical",
-							}}
-						/>
-					</div>
+						<div>
+							<label
+								htmlFor="deck-description"
+								className="block text-sm font-medium text-slate mb-1.5"
+							>
+								Description{" "}
+								<span className="text-muted font-normal">(optional)</span>
+							</label>
+							<textarea
+								id="deck-description"
+								value={description}
+								onChange={(e) => setDescription(e.target.value)}
+								maxLength={1000}
+								disabled={isSubmitting}
+								rows={3}
+								className="w-full px-4 py-2.5 bg-ivory border border-border rounded-lg text-slate placeholder-muted transition-all duration-200 hover:border-muted focus:border-primary focus:ring-2 focus:ring-primary/10 disabled:opacity-50 disabled:cursor-not-allowed resize-none"
+								placeholder="What will you learn?"
+							/>
+						</div>
 
-					<div
-						style={{
-							display: "flex",
-							gap: "0.5rem",
-							justifyContent: "flex-end",
-						}}
-					>
-						<button type="button" onClick={handleClose} disabled={isSubmitting}>
-							Cancel
-						</button>
-						<button type="submit" disabled={isSubmitting || !name.trim()}>
-							{isSubmitting ? "Creating..." : "Create"}
-						</button>
-					</div>
-				</form>
+						<div className="flex gap-3 justify-end pt-2">
+							<button
+								type="button"
+								onClick={handleClose}
+								disabled={isSubmitting}
+								className="px-4 py-2 text-slate hover:bg-ivory rounded-lg transition-colors disabled:opacity-50"
+							>
+								Cancel
+							</button>
+							<button
+								type="submit"
+								disabled={isSubmitting || !name.trim()}
+								className="px-4 py-2 bg-primary hover:bg-primary-dark text-white font-medium rounded-lg transition-all duration-200 disabled:opacity-50 disabled:cursor-not-allowed"
+							>
+								{isSubmitting ? "Creating..." : "Create Deck"}
+							</button>
+						</div>
+					</form>
+				</div>
 			</div>
 		</div>
 	);
diff --git a/src/client/components/DeleteCardModal.tsx b/src/client/components/DeleteCardModal.tsx
index 99abbd0..44a745d 100644
--- a/src/client/components/DeleteCardModal.tsx
+++ b/src/client/components/DeleteCardModal.tsx
@@ -81,18 +81,7 @@ export function DeleteCardModal({
 			role="dialog"
 			aria-modal="true"
 			aria-labelledby="delete-card-title"
-			style={{
-				position: "fixed",
-				top: 0,
-				left: 0,
-				right: 0,
-				bottom: 0,
-				backgroundColor: "rgba(0, 0, 0, 0.5)",
-				display: "flex",
-				alignItems: "center",
-				justifyContent: "center",
-				zIndex: 1000,
-			}}
+			className="fixed inset-0 bg-ink/40 backdrop-blur-sm flex items-center justify-center z-50 p-4 animate-fade-in"
 			onClick={(e) => {
 				if (e.target === e.currentTarget) {
 					handleClose();
@@ -104,56 +93,69 @@ export function DeleteCardModal({
 				}
 			}}
 		>
-			<div
-				style={{
-					backgroundColor: "white",
-					padding: "1.5rem",
-					borderRadius: "8px",
-					width: "100%",
-					maxWidth: "400px",
-					margin: "1rem",
-				}}
-			>
-				<h2 id="delete-card-title" style={{ marginTop: 0 }}>
-					Delete Card
-				</h2>
-
-				{error && (
-					<div role="alert" style={{ color: "red", marginBottom: "1rem" }}>
-						{error}
+			<div className="bg-white rounded-2xl shadow-xl w-full max-w-md animate-scale-in">
+				<div className="p-6">
+					<div className="w-12 h-12 mx-auto mb-4 bg-error/10 rounded-full flex items-center justify-center">
+						<svg
+							className="w-6 h-6 text-error"
+							fill="none"
+							stroke="currentColor"
+							viewBox="0 0 24 24"
+							aria-hidden="true"
+						>
+							<path
+								strokeLinecap="round"
+								strokeLinejoin="round"
+								strokeWidth={2}
+								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>
 					</div>
-				)}
-
-				<p>Are you sure you want to delete this card?</p>
-				<p style={{ color: "#666", fontStyle: "italic" }}>"{displayFront}"</p>
-				<p style={{ color: "#666" }}>This action cannot be undone.</p>
-
-				<div
-					style={{
-						display: "flex",
-						gap: "0.5rem",
-						justifyContent: "flex-end",
-						marginTop: "1.5rem",
-					}}
-				>
-					<button type="button" onClick={handleClose} disabled={isDeleting}>
-						Cancel
-					</button>
-					<button
-						type="button"
-						onClick={handleDelete}
-						disabled={isDeleting}
-						style={{
-							backgroundColor: "#dc3545",
-							color: "white",
-							border: "none",
-							padding: "0.5rem 1rem",
-							borderRadius: "4px",
-							cursor: isDeleting ? "not-allowed" : "pointer",
-						}}
+
+					<h2
+						id="delete-card-title"
+						className="font-display text-xl font-medium text-ink text-center mb-2"
 					>
-						{isDeleting ? "Deleting..." : "Delete"}
-					</button>
+						Delete Card
+					</h2>
+
+					{error && (
+						<div
+							role="alert"
+							className="bg-error/5 text-error text-sm px-4 py-3 rounded-lg border border-error/20 mb-4"
+						>
+							{error}
+						</div>
+					)}
+
+					<p className="text-slate text-center mb-2">
+						Are you sure you want to delete this card?
+					</p>
+					<p className="text-muted text-sm text-center italic mb-2">
+						"{displayFront}"
+					</p>
+					<p className="text-muted text-sm text-center mb-6">
+						This action cannot be undone.
+					</p>
+
+					<div className="flex gap-3 justify-center">
+						<button
+							type="button"
+							onClick={handleClose}
+							disabled={isDeleting}
+							className="px-4 py-2 text-slate hover:bg-ivory rounded-lg transition-colors disabled:opacity-50 min-w-[100px]"
+						>
+							Cancel
+						</button>
+						<button
+							type="button"
+							onClick={handleDelete}
+							disabled={isDeleting}
+							className="px-4 py-2 bg-error hover:bg-error/90 text-white font-medium rounded-lg transition-all duration-200 disabled:opacity-50 disabled:cursor-not-allowed min-w-[100px]"
+						>
+							{isDeleting ? "Deleting..." : "Delete"}
+						</button>
+					</div>
 				</div>
 			</div>
 		</div>
diff --git a/src/client/components/DeleteDeckModal.tsx b/src/client/components/DeleteDeckModal.tsx
index 307451c..5a252e6 100644
--- a/src/client/components/DeleteDeckModal.tsx
+++ b/src/client/components/DeleteDeckModal.tsx
@@ -75,18 +75,7 @@ export function DeleteDeckModal({
 			role="dialog"
 			aria-modal="true"
 			aria-labelledby="delete-deck-title"
-			style={{
-				position: "fixed",
-				top: 0,
-				left: 0,
-				right: 0,
-				bottom: 0,
-				backgroundColor: "rgba(0, 0, 0, 0.5)",
-				display: "flex",
-				alignItems: "center",
-				justifyContent: "center",
-				zIndex: 1000,
-			}}
+			className="fixed inset-0 bg-ink/40 backdrop-blur-sm flex items-center justify-center z-50 p-4 animate-fade-in"
 			onClick={(e) => {
 				if (e.target === e.currentTarget) {
 					handleClose();
@@ -98,60 +87,68 @@ export function DeleteDeckModal({
 				}
 			}}
 		>
-			<div
-				style={{
-					backgroundColor: "white",
-					padding: "1.5rem",
-					borderRadius: "8px",
-					width: "100%",
-					maxWidth: "400px",
-					margin: "1rem",
-				}}
-			>
-				<h2 id="delete-deck-title" style={{ marginTop: 0 }}>
-					Delete Deck
-				</h2>
-
-				{error && (
-					<div role="alert" style={{ color: "red", marginBottom: "1rem" }}>
-						{error}
+			<div className="bg-white rounded-2xl shadow-xl w-full max-w-md animate-scale-in">
+				<div className="p-6">
+					<div className="w-12 h-12 mx-auto mb-4 bg-error/10 rounded-full flex items-center justify-center">
+						<svg
+							className="w-6 h-6 text-error"
+							fill="none"
+							stroke="currentColor"
+							viewBox="0 0 24 24"
+							aria-hidden="true"
+						>
+							<path
+								strokeLinecap="round"
+								strokeLinejoin="round"
+								strokeWidth={2}
+								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>
 					</div>
-				)}
-
-				<p>
-					Are you sure you want to delete <strong>{deck.name}</strong>?
-				</p>
-				<p style={{ color: "#666" }}>
-					This action cannot be undone. All cards in this deck will also be
-					deleted.
-				</p>
-
-				<div
-					style={{
-						display: "flex",
-						gap: "0.5rem",
-						justifyContent: "flex-end",
-						marginTop: "1.5rem",
-					}}
-				>
-					<button type="button" onClick={handleClose} disabled={isDeleting}>
-						Cancel
-					</button>
-					<button
-						type="button"
-						onClick={handleDelete}
-						disabled={isDeleting}
-						style={{
-							backgroundColor: "#dc3545",
-							color: "white",
-							border: "none",
-							padding: "0.5rem 1rem",
-							borderRadius: "4px",
-							cursor: isDeleting ? "not-allowed" : "pointer",
-						}}
+
+					<h2
+						id="delete-deck-title"
+						className="font-display text-xl font-medium text-ink text-center mb-2"
 					>
-						{isDeleting ? "Deleting..." : "Delete"}
-					</button>
+						Delete Deck
+					</h2>
+
+					{error && (
+						<div
+							role="alert"
+							className="bg-error/5 text-error text-sm px-4 py-3 rounded-lg border border-error/20 mb-4"
+						>
+							{error}
+						</div>
+					)}
+
+					<p className="text-slate text-center mb-2">
+						Are you sure you want to delete{" "}
+						<span className="font-semibold">{deck.name}</span>?
+					</p>
+					<p className="text-muted text-sm text-center mb-6">
+						This action cannot be undone. All cards in this deck will also be
+						deleted.
+					</p>
+
+					<div className="flex gap-3 justify-center">
+						<button
+							type="button"
+							onClick={handleClose}
+							disabled={isDeleting}
+							className="px-4 py-2 text-slate hover:bg-ivory rounded-lg transition-colors disabled:opacity-50 min-w-[100px]"
+						>
+							Cancel
+						</button>
+						<button
+							type="button"
+							onClick={handleDelete}
+							disabled={isDeleting}
+							className="px-4 py-2 bg-error hover:bg-error/90 text-white font-medium rounded-lg transition-all duration-200 disabled:opacity-50 disabled:cursor-not-allowed min-w-[100px]"
+						>
+							{isDeleting ? "Deleting..." : "Delete"}
+						</button>
+					</div>
 				</div>
 			</div>
 		</div>
diff --git a/src/client/components/EditCardModal.test.tsx b/src/client/components/EditCardModal.test.tsx
index f37698f..b07dd4b 100644
--- a/src/client/components/EditCardModal.test.tsx
+++ b/src/client/components/EditCardModal.test.tsx
@@ -76,7 +76,7 @@ describe("EditCardModal", () => {
 		expect(screen.getByLabelText("Front")).toBeDefined();
 		expect(screen.getByLabelText("Back")).toBeDefined();
 		expect(screen.getByRole("button", { name: "Cancel" })).toBeDefined();
-		expect(screen.getByRole("button", { name: "Save" })).toBeDefined();
+		expect(screen.getByRole("button", { name: "Save Changes" })).toBeDefined();
 	});
 
 	it("populates form with card values", () => {
@@ -96,7 +96,7 @@ describe("EditCardModal", () => {
 		const frontInput = screen.getByLabelText("Front");
 		await user.clear(frontInput);
 
-		const saveButton = screen.getByRole("button", { name: "Save" });
+		const saveButton = screen.getByRole("button", { name: "Save Changes" });
 		expect(saveButton).toHaveProperty("disabled", true);
 	});
 
@@ -107,14 +107,14 @@ describe("EditCardModal", () => {
 		const backInput = screen.getByLabelText("Back");
 		await user.clear(backInput);
 
-		const saveButton = screen.getByRole("button", { name: "Save" });
+		const saveButton = screen.getByRole("button", { name: "Save Changes" });
 		expect(saveButton).toHaveProperty("disabled", true);
 	});
 
 	it("enables save button when both front and back have content", () => {
 		render(<EditCardModal {...defaultProps} />);
 
-		const saveButton = screen.getByRole("button", { name: "Save" });
+		const saveButton = screen.getByRole("button", { name: "Save Changes" });
 		expect(saveButton).toHaveProperty("disabled", false);
 	});
 
@@ -180,7 +180,7 @@ describe("EditCardModal", () => {
 		const frontInput = screen.getByLabelText("Front");
 		await user.clear(frontInput);
 		await user.type(frontInput, "Updated front");
-		await user.click(screen.getByRole("button", { name: "Save" }));
+		await user.click(screen.getByRole("button", { name: "Save Changes" }));
 
 		await waitFor(() => {
 			expect(mockFetch).toHaveBeenCalledWith(
@@ -232,7 +232,7 @@ describe("EditCardModal", () => {
 		const backInput = screen.getByLabelText("Back");
 		await user.clear(backInput);
 		await user.type(backInput, "Updated back");
-		await user.click(screen.getByRole("button", { name: "Save" }));
+		await user.click(screen.getByRole("button", { name: "Save Changes" }));
 
 		await waitFor(() => {
 			expect(mockFetch).toHaveBeenCalledWith(
@@ -270,7 +270,7 @@ describe("EditCardModal", () => {
 		};
 		render(<EditCardModal {...defaultProps} card={cardWithWhitespace} />);
 
-		await user.click(screen.getByRole("button", { name: "Save" }));
+		await user.click(screen.getByRole("button", { name: "Save Changes" }));
 
 		await waitFor(() => {
 			expect(mockFetch).toHaveBeenCalledWith(
@@ -297,7 +297,7 @@ describe("EditCardModal", () => {
 
 		render(<EditCardModal {...defaultProps} />);
 
-		await user.click(screen.getByRole("button", { name: "Save" }));
+		await user.click(screen.getByRole("button", { name: "Save Changes" }));
 
 		expect(screen.getByRole("button", { name: "Saving..." })).toBeDefined();
 		expect(screen.getByRole("button", { name: "Saving..." })).toHaveProperty(
@@ -323,7 +323,7 @@ describe("EditCardModal", () => {
 
 		render(<EditCardModal {...defaultProps} />);
 
-		await user.click(screen.getByRole("button", { name: "Save" }));
+		await user.click(screen.getByRole("button", { name: "Save Changes" }));
 
 		await waitFor(() => {
 			expect(screen.getByRole("alert").textContent).toContain("Card not found");
@@ -337,7 +337,7 @@ describe("EditCardModal", () => {
 
 		render(<EditCardModal {...defaultProps} />);
 
-		await user.click(screen.getByRole("button", { name: "Save" }));
+		await user.click(screen.getByRole("button", { name: "Save Changes" }));
 
 		await waitFor(() => {
 			expect(screen.getByRole("alert").textContent).toContain(
@@ -353,7 +353,7 @@ describe("EditCardModal", () => {
 
 		render(<EditCardModal {...defaultProps} />);
 
-		await user.click(screen.getByRole("button", { name: "Save" }));
+		await user.click(screen.getByRole("button", { name: "Save Changes" }));
 
 		await waitFor(() => {
 			expect(screen.getByRole("alert").textContent).toContain(
@@ -396,7 +396,7 @@ describe("EditCardModal", () => {
 		);
 
 		// Trigger error
-		await user.click(screen.getByRole("button", { name: "Save" }));
+		await user.click(screen.getByRole("button", { name: "Save Changes" }));
 		await waitFor(() => {
 			expect(screen.getByRole("alert")).toBeDefined();
 		});
diff --git a/src/client/components/EditCardModal.tsx b/src/client/components/EditCardModal.tsx
index 2d04581..e38a2b1 100644
--- a/src/client/components/EditCardModal.tsx
+++ b/src/client/components/EditCardModal.tsx
@@ -99,18 +99,7 @@ export function EditCardModal({
 			role="dialog"
 			aria-modal="true"
 			aria-labelledby="edit-card-title"
-			style={{
-				position: "fixed",
-				top: 0,
-				left: 0,
-				right: 0,
-				bottom: 0,
-				backgroundColor: "rgba(0, 0, 0, 0.5)",
-				display: "flex",
-				alignItems: "center",
-				justifyContent: "center",
-				zIndex: 1000,
-			}}
+			className="fixed inset-0 bg-ink/40 backdrop-blur-sm flex items-center justify-center z-50 p-4 animate-fade-in"
 			onClick={(e) => {
 				if (e.target === e.currentTarget) {
 					handleClose();
@@ -122,88 +111,82 @@ export function EditCardModal({
 				}
 			}}
 		>
-			<div
-				style={{
-					backgroundColor: "white",
-					padding: "1.5rem",
-					borderRadius: "8px",
-					width: "100%",
-					maxWidth: "500px",
-					margin: "1rem",
-				}}
-			>
-				<h2 id="edit-card-title" style={{ marginTop: 0 }}>
-					Edit Card
-				</h2>
-
-				<form onSubmit={handleSubmit}>
-					{error && (
-						<div role="alert" style={{ color: "red", marginBottom: "1rem" }}>
-							{error}
-						</div>
-					)}
-
-					<div style={{ marginBottom: "1rem" }}>
-						<label
-							htmlFor="edit-card-front"
-							style={{ display: "block", marginBottom: "0.25rem" }}
-						>
-							Front
-						</label>
-						<textarea
-							id="edit-card-front"
-							value={front}
-							onChange={(e) => setFront(e.target.value)}
-							required
-							disabled={isSubmitting}
-							rows={3}
-							placeholder="Question or prompt"
-							style={{
-								width: "100%",
-								boxSizing: "border-box",
-								resize: "vertical",
-							}}
-						/>
-					</div>
-
-					<div style={{ marginBottom: "1rem" }}>
-						<label
-							htmlFor="edit-card-back"
-							style={{ display: "block", marginBottom: "0.25rem" }}
-						>
-							Back
-						</label>
-						<textarea
-							id="edit-card-back"
-							value={back}
-							onChange={(e) => setBack(e.target.value)}
-							required
-							disabled={isSubmitting}
-							rows={3}
-							placeholder="Answer or explanation"
-							style={{
-								width: "100%",
-								boxSizing: "border-box",
-								resize: "vertical",
-							}}
-						/>
-					</div>
-
-					<div
-						style={{
-							display: "flex",
-							gap: "0.5rem",
-							justifyContent: "flex-end",
-						}}
+			<div className="bg-white rounded-2xl shadow-xl w-full max-w-lg animate-scale-in">
+				<div className="p-6">
+					<h2
+						id="edit-card-title"
+						className="font-display text-xl font-medium text-ink mb-6"
 					>
-						<button type="button" onClick={handleClose} disabled={isSubmitting}>
-							Cancel
-						</button>
-						<button type="submit" disabled={isSubmitting || !isFormValid}>
-							{isSubmitting ? "Saving..." : "Save"}
-						</button>
-					</div>
-				</form>
+						Edit Card
+					</h2>
+
+					<form onSubmit={handleSubmit} className="space-y-4">
+						{error && (
+							<div
+								role="alert"
+								className="bg-error/5 text-error text-sm px-4 py-3 rounded-lg border border-error/20"
+							>
+								{error}
+							</div>
+						)}
+
+						<div>
+							<label
+								htmlFor="edit-card-front"
+								className="block text-sm font-medium text-slate mb-1.5"
+							>
+								Front
+							</label>
+							<textarea
+								id="edit-card-front"
+								value={front}
+								onChange={(e) => setFront(e.target.value)}
+								required
+								disabled={isSubmitting}
+								rows={3}
+								placeholder="Question or prompt"
+								className="w-full px-4 py-2.5 bg-ivory border border-border rounded-lg text-slate placeholder-muted transition-all duration-200 hover:border-muted focus:border-primary focus:ring-2 focus:ring-primary/10 disabled:opacity-50 disabled:cursor-not-allowed resize-none"
+							/>
+						</div>
+
+						<div>
+							<label
+								htmlFor="edit-card-back"
+								className="block text-sm font-medium text-slate mb-1.5"
+							>
+								Back
+							</label>
+							<textarea
+								id="edit-card-back"
+								value={back}
+								onChange={(e) => setBack(e.target.value)}
+								required
+								disabled={isSubmitting}
+								rows={3}
+								placeholder="Answer or explanation"
+								className="w-full px-4 py-2.5 bg-ivory border border-border rounded-lg text-slate placeholder-muted transition-all duration-200 hover:border-muted focus:border-primary focus:ring-2 focus:ring-primary/10 disabled:opacity-50 disabled:cursor-not-allowed resize-none"
+							/>
+						</div>
+
+						<div className="flex gap-3 justify-end pt-2">
+							<button
+								type="button"
+								onClick={handleClose}
+								disabled={isSubmitting}
+								className="px-4 py-2 text-slate hover:bg-ivory rounded-lg transition-colors disabled:opacity-50"
+							>
+								Cancel
+							</button>
+							<button
+								type="submit"
+								disabled={isSubmitting || !isFormValid}
+								className="px-4 py-2 bg-primary hover:bg-primary-dark text-white font-medium rounded-lg transition-all duration-200 disabled:opacity-50 disabled:cursor-not-allowed"
+							>
+								{isSubmitting ? "Saving..." : "Save Changes"}
+							</button>
+						</div>
+					</form>
+				</div>
 			</div>
 		</div>
 	);
diff --git a/src/client/components/EditDeckModal.test.tsx b/src/client/components/EditDeckModal.test.tsx
index e4c997e..c627dd5 100644
--- a/src/client/components/EditDeckModal.test.tsx
+++ b/src/client/components/EditDeckModal.test.tsx
@@ -76,7 +76,7 @@ describe("EditDeckModal", () => {
 		expect(screen.getByLabelText("Name")).toBeDefined();
 		expect(screen.getByLabelText("Description (optional)")).toBeDefined();
 		expect(screen.getByRole("button", { name: "Cancel" })).toBeDefined();
-		expect(screen.getByRole("button", { name: "Save" })).toBeDefined();
+		expect(screen.getByRole("button", { name: "Save Changes" })).toBeDefined();
 	});
 
 	it("populates form with deck values", () => {
@@ -106,14 +106,14 @@ describe("EditDeckModal", () => {
 		const nameInput = screen.getByLabelText("Name");
 		await user.clear(nameInput);
 
-		const saveButton = screen.getByRole("button", { name: "Save" });
+		const saveButton = screen.getByRole("button", { name: "Save Changes" });
 		expect(saveButton).toHaveProperty("disabled", true);
 	});
 
 	it("enables save button when name has content", () => {
 		render(<EditDeckModal {...defaultProps} />);
 
-		const saveButton = screen.getByRole("button", { name: "Save" });
+		const saveButton = screen.getByRole("button", { name: "Save Changes" });
 		expect(saveButton).toHaveProperty("disabled", false);
 	});
 
@@ -179,7 +179,7 @@ describe("EditDeckModal", () => {
 		const nameInput = screen.getByLabelText("Name");
 		await user.clear(nameInput);
 		await user.type(nameInput, "Updated Deck");
-		await user.click(screen.getByRole("button", { name: "Save" }));
+		await user.click(screen.getByRole("button", { name: "Save Changes" }));
 
 		await waitFor(() => {
 			expect(mockFetch).toHaveBeenCalledWith("/api/decks/deck-123", {
@@ -228,7 +228,7 @@ describe("EditDeckModal", () => {
 		const descInput = screen.getByLabelText("Description (optional)");
 		await user.clear(descInput);
 		await user.type(descInput, "New description");
-		await user.click(screen.getByRole("button", { name: "Save" }));
+		await user.click(screen.getByRole("button", { name: "Save Changes" }));
 
 		await waitFor(() => {
 			expect(mockFetch).toHaveBeenCalledWith("/api/decks/deck-123", {
@@ -267,7 +267,7 @@ describe("EditDeckModal", () => {
 
 		const descInput = screen.getByLabelText("Description (optional)");
 		await user.clear(descInput);
-		await user.click(screen.getByRole("button", { name: "Save" }));
+		await user.click(screen.getByRole("button", { name: "Save Changes" }));
 
 		await waitFor(() => {
 			expect(mockFetch).toHaveBeenCalledWith("/api/decks/deck-123", {
@@ -299,7 +299,7 @@ describe("EditDeckModal", () => {
 		};
 		render(<EditDeckModal {...defaultProps} deck={deckWithWhitespace} />);
 
-		await user.click(screen.getByRole("button", { name: "Save" }));
+		await user.click(screen.getByRole("button", { name: "Save Changes" }));
 
 		await waitFor(() => {
 			expect(mockFetch).toHaveBeenCalledWith("/api/decks/deck-123", {
@@ -323,7 +323,7 @@ describe("EditDeckModal", () => {
 
 		render(<EditDeckModal {...defaultProps} />);
 
-		await user.click(screen.getByRole("button", { name: "Save" }));
+		await user.click(screen.getByRole("button", { name: "Save Changes" }));
 
 		expect(screen.getByRole("button", { name: "Saving..." })).toBeDefined();
 		expect(screen.getByRole("button", { name: "Saving..." })).toHaveProperty(
@@ -352,7 +352,7 @@ describe("EditDeckModal", () => {
 
 		render(<EditDeckModal {...defaultProps} />);
 
-		await user.click(screen.getByRole("button", { name: "Save" }));
+		await user.click(screen.getByRole("button", { name: "Save Changes" }));
 
 		await waitFor(() => {
 			expect(screen.getByRole("alert").textContent).toContain(
@@ -368,7 +368,7 @@ describe("EditDeckModal", () => {
 
 		render(<EditDeckModal {...defaultProps} />);
 
-		await user.click(screen.getByRole("button", { name: "Save" }));
+		await user.click(screen.getByRole("button", { name: "Save Changes" }));
 
 		await waitFor(() => {
 			expect(screen.getByRole("alert").textContent).toContain(
@@ -384,7 +384,7 @@ describe("EditDeckModal", () => {
 
 		render(<EditDeckModal {...defaultProps} />);
 
-		await user.click(screen.getByRole("button", { name: "Save" }));
+		await user.click(screen.getByRole("button", { name: "Save Changes" }));
 
 		await waitFor(() => {
 			expect(screen.getByRole("alert").textContent).toContain(
@@ -430,7 +430,7 @@ describe("EditDeckModal", () => {
 		);
 
 		// Trigger error
-		await user.click(screen.getByRole("button", { name: "Save" }));
+		await user.click(screen.getByRole("button", { name: "Save Changes" }));
 		await waitFor(() => {
 			expect(screen.getByRole("alert")).toBeDefined();
 		});
diff --git a/src/client/components/EditDeckModal.tsx b/src/client/components/EditDeckModal.tsx
index 46f1d4b..e589900 100644
--- a/src/client/components/EditDeckModal.tsx
+++ b/src/client/components/EditDeckModal.tsx
@@ -96,18 +96,7 @@ export function EditDeckModal({
 			role="dialog"
 			aria-modal="true"
 			aria-labelledby="edit-deck-title"
-			style={{
-				position: "fixed",
-				top: 0,
-				left: 0,
-				right: 0,
-				bottom: 0,
-				backgroundColor: "rgba(0, 0, 0, 0.5)",
-				display: "flex",
-				alignItems: "center",
-				justifyContent: "center",
-				zIndex: 1000,
-			}}
+			className="fixed inset-0 bg-ink/40 backdrop-blur-sm flex items-center justify-center z-50 p-4 animate-fade-in"
 			onClick={(e) => {
 				if (e.target === e.currentTarget) {
 					handleClose();
@@ -119,83 +108,82 @@ export function EditDeckModal({
 				}
 			}}
 		>
-			<div
-				style={{
-					backgroundColor: "white",
-					padding: "1.5rem",
-					borderRadius: "8px",
-					width: "100%",
-					maxWidth: "400px",
-					margin: "1rem",
-				}}
-			>
-				<h2 id="edit-deck-title" style={{ marginTop: 0 }}>
-					Edit Deck
-				</h2>
-
-				<form onSubmit={handleSubmit}>
-					{error && (
-						<div role="alert" style={{ color: "red", marginBottom: "1rem" }}>
-							{error}
-						</div>
-					)}
-
-					<div style={{ marginBottom: "1rem" }}>
-						<label
-							htmlFor="edit-deck-name"
-							style={{ display: "block", marginBottom: "0.25rem" }}
-						>
-							Name
-						</label>
-						<input
-							id="edit-deck-name"
-							type="text"
-							value={name}
-							onChange={(e) => setName(e.target.value)}
-							required
-							maxLength={255}
-							disabled={isSubmitting}
-							style={{ width: "100%", boxSizing: "border-box" }}
-						/>
-					</div>
-
-					<div style={{ marginBottom: "1rem" }}>
-						<label
-							htmlFor="edit-deck-description"
-							style={{ display: "block", marginBottom: "0.25rem" }}
-						>
-							Description (optional)
-						</label>
-						<textarea
-							id="edit-deck-description"
-							value={description}
-							onChange={(e) => setDescription(e.target.value)}
-							maxLength={1000}
-							disabled={isSubmitting}
-							rows={3}
-							style={{
-								width: "100%",
-								boxSizing: "border-box",
-								resize: "vertical",
-							}}
-						/>
-					</div>
-
-					<div
-						style={{
-							display: "flex",
-							gap: "0.5rem",
-							justifyContent: "flex-end",
-						}}
+			<div className="bg-white rounded-2xl shadow-xl w-full max-w-md animate-scale-in">
+				<div className="p-6">
+					<h2
+						id="edit-deck-title"
+						className="font-display text-xl font-medium text-ink mb-6"
 					>
-						<button type="button" onClick={handleClose} disabled={isSubmitting}>
-							Cancel
-						</button>
-						<button type="submit" disabled={isSubmitting || !name.trim()}>
-							{isSubmitting ? "Saving..." : "Save"}
-						</button>
-					</div>
-				</form>
+						Edit Deck
+					</h2>
+
+					<form onSubmit={handleSubmit} className="space-y-4">
+						{error && (
+							<div
+								role="alert"
+								className="bg-error/5 text-error text-sm px-4 py-3 rounded-lg border border-error/20"
+							>
+								{error}
+							</div>
+						)}
+
+						<div>
+							<label
+								htmlFor="edit-deck-name"
+								className="block text-sm font-medium text-slate mb-1.5"
+							>
+								Name
+							</label>
+							<input
+								id="edit-deck-name"
+								type="text"
+								value={name}
+								onChange={(e) => setName(e.target.value)}
+								required
+								maxLength={255}
+								disabled={isSubmitting}
+								className="w-full px-4 py-2.5 bg-ivory border border-border rounded-lg text-slate placeholder-muted transition-all duration-200 hover:border-muted focus:border-primary focus:ring-2 focus:ring-primary/10 disabled:opacity-50 disabled:cursor-not-allowed"
+							/>
+						</div>
+
+						<div>
+							<label
+								htmlFor="edit-deck-description"
+								className="block text-sm font-medium text-slate mb-1.5"
+							>
+								Description{" "}
+								<span className="text-muted font-normal">(optional)</span>
+							</label>
+							<textarea
+								id="edit-deck-description"
+								value={description}
+								onChange={(e) => setDescription(e.target.value)}
+								maxLength={1000}
+								disabled={isSubmitting}
+								rows={3}
+								className="w-full px-4 py-2.5 bg-ivory border border-border rounded-lg text-slate placeholder-muted transition-all duration-200 hover:border-muted focus:border-primary focus:ring-2 focus:ring-primary/10 disabled:opacity-50 disabled:cursor-not-allowed resize-none"
+							/>
+						</div>
+
+						<div className="flex gap-3 justify-end pt-2">
+							<button
+								type="button"
+								onClick={handleClose}
+								disabled={isSubmitting}
+								className="px-4 py-2 text-slate hover:bg-ivory rounded-lg transition-colors disabled:opacity-50"
+							>
+								Cancel
+							</button>
+							<button
+								type="submit"
+								disabled={isSubmitting || !name.trim()}
+								className="px-4 py-2 bg-primary hover:bg-primary-dark text-white font-medium rounded-lg transition-all duration-200 disabled:opacity-50 disabled:cursor-not-allowed"
+							>
+								{isSubmitting ? "Saving..." : "Save Changes"}
+							</button>
+						</div>
+					</form>
+				</div>
 			</div>
 		</div>
 	);
diff --git a/src/client/components/OfflineBanner.test.tsx b/src/client/components/OfflineBanner.test.tsx
index 41679d9..53ba815 100644
--- a/src/client/components/OfflineBanner.test.tsx
+++ b/src/client/components/OfflineBanner.test.tsx
@@ -79,7 +79,8 @@ describe("OfflineBanner", () => {
 		render(<OfflineBanner />);
 
 		const banner = screen.getByTestId("offline-banner");
-		expect(banner.getAttribute("role")).toBe("status");
+		// <output> element has implicit role="status", so we check it's an output element
+		expect(banner.tagName.toLowerCase()).toBe("output");
 		expect(banner.getAttribute("aria-live")).toBe("polite");
 	});
 });
diff --git a/src/client/components/OfflineBanner.tsx b/src/client/components/OfflineBanner.tsx
index faca3e7..bf94908 100644
--- a/src/client/components/OfflineBanner.tsx
+++ b/src/client/components/OfflineBanner.tsx
@@ -10,26 +10,27 @@ export function OfflineBanner() {
 	return (
 		<output
 			data-testid="offline-banner"
-			role="status"
 			aria-live="polite"
-			style={{
-				backgroundColor: "#6c757d",
-				color: "white",
-				padding: "0.5rem 1rem",
-				textAlign: "center",
-				fontSize: "0.875rem",
-				display: "flex",
-				alignItems: "center",
-				justifyContent: "center",
-				gap: "0.5rem",
-			}}
+			className="bg-slate text-white py-2 px-4 text-sm flex items-center justify-center gap-2"
 		>
-			<span aria-hidden="true">⚡</span>
+			<svg
+				className="w-4 h-4 text-warning"
+				fill="none"
+				stroke="currentColor"
+				viewBox="0 0 24 24"
+				aria-hidden="true"
+			>
+				<path
+					strokeLinecap="round"
+					strokeLinejoin="round"
+					strokeWidth={2}
+					d="M18.364 5.636a9 9 0 010 12.728m0 0l-2.829-2.829m2.829 2.829L21 21M15.536 8.464a5 5 0 010 7.072m0 0l-2.829-2.829m-4.243 2.829a4.978 4.978 0 01-1.414-2.83m-1.414 5.658a9 9 0 01-2.167-9.238m7.824 2.167a1 1 0 111.414 1.414m-1.414-1.414L3 3m8.293 8.293l1.414 1.414"
+				/>
+			</svg>
 			<span>
 				You're offline. Changes will sync when you reconnect.
 				{pendingCount > 0 && (
-					<span data-testid="offline-pending-count">
-						{" "}
+					<span data-testid="offline-pending-count" className="ml-1 opacity-80">
 						({pendingCount} pending)
 					</span>
 				)}
diff --git a/src/client/components/SyncButton.tsx b/src/client/components/SyncButton.tsx
index 1ebfa2e..82a6c68 100644
--- a/src/client/components/SyncButton.tsx
+++ b/src/client/components/SyncButton.tsx
@@ -9,13 +9,6 @@ export function SyncButton() {
 
 	const isDisabled = !isOnline || isSyncing;
 
-	const getButtonText = (): string => {
-		if (isSyncing) {
-			return "Syncing...";
-		}
-		return "Sync";
-	};
-
 	return (
 		<button
 			type="button"
@@ -23,17 +16,55 @@ export function SyncButton() {
 			onClick={handleSync}
 			disabled={isDisabled}
 			title={!isOnline ? "Cannot sync while offline" : undefined}
-			style={{
-				padding: "0.25rem 0.5rem",
-				borderRadius: "4px",
-				border: "1px solid #dee2e6",
-				backgroundColor: isDisabled ? "#e9ecef" : "#007bff",
-				color: isDisabled ? "#6c757d" : "white",
-				cursor: isDisabled ? "not-allowed" : "pointer",
-				fontSize: "0.875rem",
-			}}
+			className={`inline-flex items-center gap-1.5 px-3 py-1.5 rounded-lg text-sm font-medium transition-all duration-200 ${
+				isDisabled
+					? "bg-ivory text-muted cursor-not-allowed"
+					: "bg-primary text-white hover:bg-primary-dark active:scale-[0.98]"
+			}`}
 		>
-			{getButtonText()}
+			{isSyncing ? (
+				<>
+					<svg
+						className="w-4 h-4 animate-spin"
+						fill="none"
+						viewBox="0 0 24 24"
+						aria-hidden="true"
+					>
+						<circle
+							className="opacity-25"
+							cx="12"
+							cy="12"
+							r="10"
+							stroke="currentColor"
+							strokeWidth="4"
+						/>
+						<path
+							className="opacity-75"
+							fill="currentColor"
+							d="M4 12a8 8 0 018-8V0C5.373 0 0 5.373 0 12h4z"
+						/>
+					</svg>
+					<span>Syncing...</span>
+				</>
+			) : (
+				<>
+					<svg
+						className="w-4 h-4"
+						fill="none"
+						stroke="currentColor"
+						viewBox="0 0 24 24"
+						aria-hidden="true"
+					>
+						<path
+							strokeLinecap="round"
+							strokeLinejoin="round"
+							strokeWidth={2}
+							d="M4 4v5h.582m15.356 2A8.001 8.001 0 004.582 9m0 0H9m11 11v-5h-.581m0 0a8.003 8.003 0 01-15.357-2m15.357 2H15"
+						/>
+					</svg>
+					<span>Sync</span>
+				</>
+			)}
 		</button>
 	);
 }
diff --git a/src/client/components/SyncStatusIndicator.tsx b/src/client/components/SyncStatusIndicator.tsx
index 23e3ec6..0f555ca 100644
--- a/src/client/components/SyncStatusIndicator.tsx
+++ b/src/client/components/SyncStatusIndicator.tsx
@@ -20,63 +20,115 @@ export function SyncStatusIndicator() {
 		return "Synced";
 	};
 
-	const getStatusColor = (): string => {
+	const getStatusStyles = (): string => {
 		if (!isOnline) {
-			return "#6c757d"; // gray
+			return "bg-muted/10 text-muted";
 		}
 		if (isSyncing) {
-			return "#007bff"; // blue
+			return "bg-info/10 text-info";
 		}
 		if (status === SyncStatus.Error) {
-			return "#dc3545"; // red
+			return "bg-error/10 text-error";
 		}
 		if (pendingCount > 0) {
-			return "#ffc107"; // yellow
+			return "bg-warning/10 text-warning";
 		}
-		return "#28a745"; // green
+		return "bg-success/10 text-success";
 	};
 
-	const getStatusIcon = (): string => {
+	const getStatusIcon = () => {
 		if (!isOnline) {
-			return "\u25CB"; // hollow circle
+			return (
+				<svg
+					className="w-3.5 h-3.5"
+					fill="currentColor"
+					viewBox="0 0 20 20"
+					aria-hidden="true"
+				>
+					<circle cx="10" cy="10" r="4" />
+				</svg>
+			);
 		}
 		if (isSyncing) {
-			return "\u21BB"; // rotating arrows
+			return (
+				<svg
+					className="w-3.5 h-3.5 animate-spin"
+					fill="none"
+					viewBox="0 0 24 24"
+					aria-hidden="true"
+				>
+					<circle
+						className="opacity-25"
+						cx="12"
+						cy="12"
+						r="10"
+						stroke="currentColor"
+						strokeWidth="4"
+					/>
+					<path
+						className="opacity-75"
+						fill="currentColor"
+						d="M4 12a8 8 0 018-8V0C5.373 0 0 5.373 0 12h4z"
+					/>
+				</svg>
+			);
 		}
 		if (status === SyncStatus.Error) {
-			return "\u2717"; // cross mark
+			return (
+				<svg
+					className="w-3.5 h-3.5"
+					fill="currentColor"
+					viewBox="0 0 20 20"
+					aria-hidden="true"
+				>
+					<path
+						fillRule="evenodd"
+						d="M10 18a8 8 0 100-16 8 8 0 000 16zM8.707 7.293a1 1 0 00-1.414 1.414L8.586 10l-1.293 1.293a1 1 0 101.414 1.414L10 11.414l1.293 1.293a1 1 0 001.414-1.414L11.414 10l1.293-1.293a1 1 0 00-1.414-1.414L10 8.586 8.707 7.293z"
+						clipRule="evenodd"
+					/>
+				</svg>
+			);
 		}
 		if (pendingCount > 0) {
-			return "\u25D4"; // partial circle
+			return (
+				<svg
+					className="w-3.5 h-3.5"
+					fill="currentColor"
+					viewBox="0 0 20 20"
+					aria-hidden="true"
+				>
+					<path
+						fillRule="evenodd"
+						d="M10 18a8 8 0 100-16 8 8 0 000 16zm1-12a1 1 0 10-2 0v4a1 1 0 00.293.707l2.828 2.829a1 1 0 101.415-1.415L11 9.586V6z"
+						clipRule="evenodd"
+					/>
+				</svg>
+			);
 		}
-		return "\u2713"; // check mark
+		return (
+			<svg
+				className="w-3.5 h-3.5"
+				fill="currentColor"
+				viewBox="0 0 20 20"
+				aria-hidden="true"
+			>
+				<path
+					fillRule="evenodd"
+					d="M10 18a8 8 0 100-16 8 8 0 000 16zm3.707-9.293a1 1 0 00-1.414-1.414L9 10.586 7.707 9.293a1 1 0 00-1.414 1.414l2 2a1 1 0 001.414 0l4-4z"
+					clipRule="evenodd"
+				/>
+			</svg>
+		);
 	};
 
 	return (
 		<div
 			data-testid="sync-status-indicator"
-			style={{
-				display: "inline-flex",
-				alignItems: "center",
-				gap: "0.25rem",
-				padding: "0.25rem 0.5rem",
-				borderRadius: "4px",
-				backgroundColor: "#f8f9fa",
-				border: "1px solid #dee2e6",
-				fontSize: "0.875rem",
-			}}
+			className={`inline-flex items-center gap-1.5 px-2.5 py-1 rounded-full text-xs font-medium transition-colors ${getStatusStyles()}`}
 			title={lastError || undefined}
 		>
-			<span
-				style={{
-					color: getStatusColor(),
-					fontWeight: "bold",
-				}}
-				aria-hidden="true"
-			>
-				{getStatusIcon()}
-			</span>
-			<span style={{ color: getStatusColor() }}>{getStatusText()}</span>
+			{getStatusIcon()}
+			<span>{getStatusText()}</span>
 		</div>
 	);
 }