diff --git a/frontend/src/pages/LandingPage.tsx b/frontend/src/pages/LandingPage.tsx
index baede37..56d5339 100644
--- a/frontend/src/pages/LandingPage.tsx
+++ b/frontend/src/pages/LandingPage.tsx
@@ -1,3 +1,4 @@
+import { useState, useEffect } from 'react'
 import { Link } from 'react-router-dom'
 import {
   Scissors,
@@ -14,6 +15,8 @@ import {
   Gem,
   Pen,
   FileOutput,
+  Menu,
+  X,
 } from 'lucide-react'
 
 const tools = [
@@ -34,8 +37,25 @@ const steps = [
 ]
 
 export default function LandingPage() {
+  const [mobileMenuOpen, setMobileMenuOpen] = useState(false)
+
+  // Close mobile menu on resize to desktop
+  useEffect(() => {
+    const handleResize = () => {
+      if (window.innerWidth >= 768) setMobileMenuOpen(false)
+    }
+    window.addEventListener('resize', handleResize)
+    return () => window.removeEventListener('resize', handleResize)
+  }, [])
+
+  // Prevent body scroll when mobile menu is open
+  useEffect(() => {
+    document.body.style.overflow = mobileMenuOpen ? 'hidden' : ''
+    return () => { document.body.style.overflow = '' }
+  }, [mobileMenuOpen])
+
   return (
-    <div className="min-h-screen bg-[#050e18] text-slate-200 relative">
+    <div className="min-h-screen bg-[#050e18] text-slate-200 relative overflow-x-hidden">
       {/* ── CSS ─────────────────────────────────────────────── */}
       <style>{`
         @import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,400;0,500;0,600;0,700;1,500;1,600&display=swap');
@@ -52,6 +72,14 @@ export default function LandingPage() {
           from { transform: rotate(0deg); }
           to   { transform: rotate(360deg); }
         }
+        @keyframes slideDown {
+          from { opacity: 0; transform: translateY(-12px); }
+          to   { opacity: 1; transform: translateY(0); }
+        }
+        @keyframes fadeOverlay {
+          from { opacity: 0; }
+          to   { opacity: 1; }
+        }
 
         .anim-reveal { animation: reveal .8s cubic-bezier(.16,1,.3,1) both; }
         .anim-d1 { animation-delay: .08s; }
@@ -66,12 +94,19 @@ export default function LandingPage() {
           background-size: 24px 24px;
         }
 
-        /* Crystal prism */
+        /* Crystal prism — responsive sizes */
         .prism {
-          width: 340px;
-          height: 340px;
+          width: 220px;
+          height: 220px;
           position: relative;
         }
+        @media (min-width: 480px) {
+          .prism { width: 260px; height: 260px; }
+        }
+        @media (min-width: 768px) {
+          .prism { width: 340px; height: 340px; }
+        }
+
         .prism::before {
           content: '';
           position: absolute;
@@ -91,7 +126,7 @@ export default function LandingPage() {
         .prism::after {
           content: '';
           position: absolute;
-          inset: 30px;
+          inset: 24px;
           background: conic-gradient(
             from 220deg,
             rgba(96,165,250,.1),
@@ -116,6 +151,19 @@ export default function LandingPage() {
           transform: translateY(-2px);
           box-shadow: 0 16px 48px -12px rgba(0,0,0,.5), 0 0 0 1px rgba(96,165,250,.08);
         }
+        @media (max-width: 639px) {
+          .tool-card:hover {
+            transform: none;
+          }
+        }
+
+        /* Mobile menu overlay */
+        .mobile-overlay {
+          animation: fadeOverlay .2s ease both;
+        }
+        .mobile-menu-panel {
+          animation: slideDown .25s cubic-bezier(.16,1,.3,1) both;
+        }
 
         /* Step connector dash */
         .step-connector {
@@ -133,26 +181,28 @@ export default function LandingPage() {
 
       {/* ── Ambient glow ───────────────────────────────────── */}
       <div className="fixed inset-0 pointer-events-none overflow-hidden" aria-hidden>
-        <div className="absolute -top-[30%] left-1/2 -translate-x-1/2 w-[900px] h-[900px] rounded-full"
+        <div className="absolute -top-[30%] left-1/2 -translate-x-1/2 w-[90vw] max-w-[900px] h-[90vw] max-h-[900px] rounded-full"
           style={{ background: 'radial-gradient(circle, rgba(45,98,255,.1) 0%, transparent 65%)' }} />
-        <div className="absolute top-[55%] -right-[10%] w-[500px] h-[500px] rounded-full"
+        <div className="absolute top-[55%] -right-[10%] w-[50vw] max-w-[500px] h-[50vw] max-h-[500px] rounded-full"
           style={{ background: 'radial-gradient(circle, rgba(56,189,248,.05) 0%, transparent 65%)' }} />
       </div>
 
       {/* ── Nav ────────────────────────────────────────────── */}
       <nav className="sticky top-0 z-50 backdrop-blur-xl border-b border-white/[.04]"
         style={{ background: 'rgba(5,14,24,.75)' }}>
-        <div className="max-w-6xl mx-auto flex items-center justify-between px-6 h-16">
-          <Link to="/" className="flex items-center gap-2.5 group">
-            <div className="w-8 h-8 rounded-lg bg-gradient-to-br from-brand-500 to-blue-400 flex items-center justify-center
-                            shadow-lg shadow-brand-500/20 group-hover:shadow-brand-500/40 transition-shadow">
+        <div className="max-w-6xl mx-auto flex items-center justify-between px-4 sm:px-6 h-14 sm:h-16">
+          <Link to="/" className="flex items-center gap-2 sm:gap-2.5 group">
+            <div className="w-7 h-7 sm:w-8 sm:h-8 rounded-lg bg-gradient-to-br from-brand-500 to-blue-400 flex items-center justify-center
+                            shadow-lg shadow-brand-500/20 group-hover:shadow-brand-500/40 transition-shadow shrink-0">
               <Gem size={14} className="text-white" />
             </div>
-            <span className="font-display text-lg font-semibold tracking-tight text-white">
+            <span className="font-display text-base sm:text-lg font-semibold tracking-tight text-white">
               Crystal<span className="text-blue-400">PDF</span>
             </span>
           </Link>
-          <div className="flex items-center gap-2">
+
+          {/* Desktop nav buttons */}
+          <div className="hidden md:flex items-center gap-2">
             <Link to="/login"
               className="text-sm text-slate-400 hover:text-white px-4 py-2 transition-colors">
               Sign in
@@ -164,51 +214,100 @@ export default function LandingPage() {
               Get started
             </Link>
           </div>
+
+          {/* Mobile hamburger button */}
+          <button
+            type="button"
+            className="md:hidden flex items-center justify-center w-10 h-10 rounded-lg
+                       text-slate-400 hover:text-white hover:bg-white/[.06] transition-colors"
+            onClick={() => setMobileMenuOpen(!mobileMenuOpen)}
+            aria-label={mobileMenuOpen ? 'Close menu' : 'Open menu'}
+            aria-expanded={mobileMenuOpen}
+          >
+            {mobileMenuOpen ? <X size={20} /> : <Menu size={20} />}
+          </button>
         </div>
+
+        {/* ── Mobile Menu Dropdown ─────────────────────────── */}
+        {mobileMenuOpen && (
+          <>
+            {/* Overlay */}
+            <div
+              className="mobile-overlay fixed inset-0 top-14 bg-black/60 z-40 md:hidden"
+              onClick={() => setMobileMenuOpen(false)}
+            />
+            {/* Menu panel */}
+            <div className="mobile-menu-panel absolute top-14 inset-x-0 z-50 md:hidden border-b border-white/[.06]"
+              style={{ background: 'rgba(5,14,24,.97)' }}>
+              <div className="max-w-6xl mx-auto px-4 py-4 flex flex-col gap-2">
+                <Link
+                  to="/login"
+                  onClick={() => setMobileMenuOpen(false)}
+                  className="flex items-center justify-center py-3 px-4 rounded-xl text-[15px]
+                             text-slate-300 hover:text-white hover:bg-white/[.04]
+                             border border-white/[.06] transition-all"
+                >
+                  Sign in
+                </Link>
+                <Link
+                  to="/register"
+                  onClick={() => setMobileMenuOpen(false)}
+                  className="flex items-center justify-center gap-2 py-3 px-4 rounded-xl text-[15px] font-medium
+                             text-white bg-gradient-to-b from-brand-500 to-brand-600
+                             shadow-[0_2px_20px_rgba(45,98,255,.3)] transition-all"
+                >
+                  Get started free <ArrowRight size={15} strokeWidth={2.2} />
+                </Link>
+              </div>
+            </div>
+          </>
+        )}
       </nav>
 
       {/* ── Hero ───────────────────────────────────────────── */}
-      <section className="relative z-10 max-w-6xl mx-auto px-6
-                          pt-20 pb-24 md:pt-32 md:pb-36
-                          grid md:grid-cols-[1fr,auto] items-center gap-12">
+      <section className="relative z-10 max-w-6xl mx-auto px-4 sm:px-6
+                          pt-10 pb-12 sm:pt-16 sm:pb-20 md:pt-32 md:pb-36
+                          flex flex-col md:grid md:grid-cols-[1fr,auto] items-center gap-8 md:gap-12">
         {/* Text column */}
-        <div className="max-w-2xl">
-          <h1 className="font-display font-semibold tracking-tight leading-[1.1]
-                         text-[clamp(2.2rem,5.5vw,4.8rem)] text-white anim-reveal">
+        <div className="max-w-2xl text-center md:text-left flex flex-col items-center md:items-start">
+          <h1 className="font-display font-semibold tracking-tight leading-[1.08]
+                         text-[clamp(1.85rem,6.5vw,4.8rem)] text-white anim-reveal">
             Every<br className="hidden sm:block" /> PDF tool<br className="hidden sm:block" /> you'll ever{' '}
             <em className="not-italic text-blue-400">need.</em>
           </h1>
 
-          <p className="mt-7 text-[clamp(1rem,1.8vw,1.2rem)] leading-relaxed
+          <p className="mt-4 sm:mt-7 text-[clamp(0.9rem,2.2vw,1.2rem)] leading-relaxed
                         text-slate-400 max-w-md anim-reveal anim-d2">
             Merge, split, compress, protect, convert, and annotate&nbsp;&mdash;
             from one elegant workspace. No subscriptions, no upload limits.
           </p>
 
-          <div className="mt-10 flex flex-wrap gap-3 anim-reveal anim-d3">
+          <div className="mt-6 sm:mt-10 flex flex-col sm:flex-row w-full sm:w-auto gap-3 anim-reveal anim-d3">
             <Link to="/register"
-              className="inline-flex items-center gap-2 px-6 py-3.5 rounded-xl text-[15px] font-medium
+              className="inline-flex items-center justify-center gap-2 px-6 py-3.5 rounded-xl text-[15px] font-medium
                          text-white bg-gradient-to-b from-brand-500 to-brand-600
                          shadow-[0_2px_24px_rgba(45,98,255,.35)]
                          hover:shadow-[0_4px_32px_rgba(45,98,255,.5)]
-                         hover:-translate-y-px active:translate-y-0 transition-all">
+                         hover:-translate-y-px active:translate-y-0 transition-all
+                         active:scale-[0.98]">
               Start for free <ArrowRight size={15} strokeWidth={2.2} />
             </Link>
             <Link to="/login"
-              className="inline-flex items-center gap-2 px-6 py-3.5 rounded-xl text-[15px] font-medium
+              className="inline-flex items-center justify-center gap-2 px-6 py-3.5 rounded-xl text-[15px] font-medium
                          text-slate-300 border border-white/10 hover:border-white/20
-                         hover:bg-white/[.03] transition-all">
+                         hover:bg-white/[.03] transition-all
+                         active:scale-[0.98]">
               Sign in to workspace
             </Link>
           </div>
         </div>
 
-        {/* Crystal visual */}
-        <div className="hidden md:flex items-center justify-center anim-fade anim-d4">
+        {/* Crystal visual — visible on all screens */}
+        <div className="flex items-center justify-center anim-fade anim-d4">
           <div className="prism">
-            {/* Inner facets */}
             <div className="absolute inset-0 flex items-center justify-center">
-              <Layers size={48} className="text-blue-400/30" strokeWidth={1} />
+              <Layers size={36} className="text-blue-400/30 sm:hidden" strokeWidth={1} />
+              <Layers size={48} className="text-blue-400/30 hidden sm:block" strokeWidth={1} />
             </div>
           </div>
         </div>
@@ -216,35 +315,35 @@ export default function LandingPage() {
 
       {/* ── Tools grid ─────────────────────────────────────── */}
       <section className="relative z-10 dot-grid">
-        <div className="max-w-6xl mx-auto px-6 py-24 md:py-32">
+        <div className="max-w-6xl mx-auto px-4 sm:px-6 py-14 sm:py-24 md:py-32">
           {/* Section header */}
-          <div className="max-w-lg mb-14">
-            <p className="text-xs font-medium tracking-[.15em] uppercase text-brand-400 mb-4">
+          <div className="max-w-lg mb-8 sm:mb-14 text-center md:text-left mx-auto md:mx-0">
+            <p className="text-xs font-medium tracking-[.15em] uppercase text-brand-400 mb-3 sm:mb-4">
               Toolkit
             </p>
-            <h2 className="font-display text-[clamp(2rem,4.5vw,3.5rem)] font-semibold
+            <h2 className="font-display text-[clamp(1.6rem,5vw,3.5rem)] font-semibold
                            tracking-tight leading-[1.05] text-white">
               Everything in<br className="hidden sm:block" /> one workspace
             </h2>
-            <p className="mt-4 text-slate-500 leading-relaxed text-[15px]">
+            <p className="mt-3 sm:mt-4 text-slate-500 leading-relaxed text-sm sm:text-[15px]">
               Every operation produces a new file — your originals stay untouched.
             </p>
           </div>
 
-          {/* Grid */}
-          <div className="grid grid-cols-2 sm:grid-cols-4 gap-3">
+          {/* Grid — 1 col on tiny, 2 col on small, 4 col on sm+ */}
+          <div className="grid grid-cols-2 min-[480px]:grid-cols-2 sm:grid-cols-4 gap-2.5 sm:gap-3">
             {tools.map((t) => (
-              <div key={t.name} className="tool-card rounded-2xl p-5 cursor-default group">
-                <div className="w-10 h-10 rounded-xl bg-blue-400/[.08] border border-blue-400/[.12]
-                                flex items-center justify-center mb-4
+              <div key={t.name} className="tool-card rounded-2xl p-3.5 sm:p-5 cursor-default group">
+                <div className="w-9 h-9 sm:w-10 sm:h-10 rounded-xl bg-blue-400/[.08] border border-blue-400/[.12]
+                                flex items-center justify-center mb-2.5 sm:mb-4
                                 group-hover:bg-blue-400/[.12] group-hover:border-blue-400/[.2]
                                 transition-colors">
-                  <t.icon size={18} className="text-blue-400" strokeWidth={1.8} />
+                  <t.icon size={16} className="text-blue-400 sm:w-[18px] sm:h-[18px]" strokeWidth={1.8} />
                 </div>
-                <p className="text-[15px] font-semibold text-white tracking-tight mb-1">
+                <p className="text-sm sm:text-[15px] font-semibold text-white tracking-tight mb-0.5 sm:mb-1">
                   {t.name}
                 </p>
-                <p className="text-[13px] text-slate-500 leading-snug">
+                <p className="text-xs sm:text-[13px] text-slate-500 leading-snug">
                   {t.desc}
                 </p>
               </div>
@@ -255,39 +354,39 @@ export default function LandingPage() {
 
       {/* ── How it works ───────────────────────────────────── */}
       <section className="relative z-10 border-t border-white/[.04]">
-        <div className="max-w-3xl mx-auto px-6 py-24 md:py-32">
-          <div className="text-center max-w-lg mx-auto mb-16">
-            <p className="text-xs font-medium tracking-[.15em] uppercase text-brand-400 mb-4">
+        <div className="max-w-3xl mx-auto px-4 sm:px-6 py-14 sm:py-24 md:py-32">
+          <div className="text-center max-w-lg mx-auto mb-10 sm:mb-16">
+            <p className="text-xs font-medium tracking-[.15em] uppercase text-brand-400 mb-3 sm:mb-4">
               How it works
             </p>
-            <h2 className="font-display text-[clamp(2rem,4.5vw,3.5rem)] font-semibold
+            <h2 className="font-display text-[clamp(1.6rem,5vw,3.5rem)] font-semibold
                            tracking-tight leading-[1.05] text-white">
               Three steps, that's it
             </h2>
           </div>
 
-          <div className="flex flex-col gap-0">
+          <div className="flex flex-col gap-0 max-w-sm mx-auto sm:max-w-none">
             {steps.map((s, i) => (
               <div key={s.num}>
                 {/* Step row */}
-                <div className="flex items-start gap-5">
-                  {/* Left: number + icon */}
+                <div className="flex items-start gap-3.5 sm:gap-5">
+                  {/* Left: icon */}
                   <div className="flex flex-col items-center">
-                    <div className="w-12 h-12 rounded-xl flex items-center justify-center
+                    <div className="w-10 h-10 sm:w-12 sm:h-12 rounded-xl flex items-center justify-center
                                     bg-brand-500/10 border border-brand-500/20 shrink-0">
-                      <s.icon size={20} className="text-blue-400" strokeWidth={1.6} />
+                      <s.icon size={18} className="text-blue-400 sm:w-5 sm:h-5" strokeWidth={1.6} />
                     </div>
                   </div>
 
                   {/* Right: text */}
-                  <div className="pt-1">
-                    <p className="text-xs font-medium text-brand-400/60 tracking-wider mb-1">
+                  <div className="pt-0.5 sm:pt-1 min-w-0">
+                    <p className="text-xs font-medium text-brand-400/60 tracking-wider mb-0.5 sm:mb-1">
                       Step {s.num}
                     </p>
-                    <h3 className="text-base font-semibold text-white tracking-tight mb-1.5">
+                    <h3 className="text-[15px] sm:text-base font-semibold text-white tracking-tight mb-1">
                       {s.title}
                     </h3>
-                    <p className="text-sm text-slate-500 leading-relaxed max-w-sm">
+                    <p className="text-xs sm:text-sm text-slate-500 leading-relaxed">
                       {s.body}
                     </p>
                   </div>
@@ -295,9 +394,9 @@ export default function LandingPage() {
 
                 {/* Connector between steps */}
                 {i < steps.length - 1 && (
-                  <div className="flex items-stretch gap-5 py-1">
-                    <div className="w-12 flex justify-center shrink-0">
-                      <div className="w-px h-8 bg-gradient-to-b from-brand-500/20 to-transparent" />
+                  <div className="flex items-stretch gap-3.5 sm:gap-5 py-1">
+                    <div className="w-10 sm:w-12 flex justify-center shrink-0">
+                      <div className="w-px h-6 sm:h-8 bg-gradient-to-b from-brand-500/20 to-transparent" />
                     </div>
                   </div>
                 )}
@@ -309,31 +408,34 @@ export default function LandingPage() {
 
       {/* ── CTA ────────────────────────────────────────────── */}
       <section className="relative z-10 border-t border-white/[.04]">
-        <div className="max-w-6xl mx-auto px-6 py-28 md:py-36 text-center">
+        <div className="max-w-6xl mx-auto px-4 sm:px-6 py-16 sm:py-28 md:py-36 text-center">
           {/* Soft top glow */}
           <div className="absolute inset-x-0 top-0 h-64 pointer-events-none"
             style={{ background: 'radial-gradient(ellipse 50% 100% at 50% 0%, rgba(45,98,255,.06), transparent)' }} />
 
-          <p className="text-sm text-slate-500 mb-4 relative">
+          <p className="text-xs sm:text-sm text-slate-500 mb-3 sm:mb-4 relative">
             Free to use. No credit card required.
           </p>
-          <h2 className="font-display text-[clamp(2.4rem,5.5vw,4.5rem)] font-semibold
-                         tracking-tight leading-[.95] text-white mb-10 relative">
+          <h2 className="font-display text-[clamp(1.6rem,5.5vw,4.5rem)] font-semibold
+                         tracking-tight leading-[1] text-white mb-7 sm:mb-10 relative">
             Start working with<br />
             your PDFs today.
           </h2>
-          <div className="relative flex flex-wrap justify-center gap-3">
+          <div className="relative flex flex-col sm:flex-row justify-center items-stretch sm:items-center gap-3
+                          max-w-xs sm:max-w-none mx-auto">
             <Link to="/register"
-              className="inline-flex items-center gap-2 px-7 py-3.5 rounded-xl text-[15px] font-medium
+              className="inline-flex items-center justify-center gap-2 px-7 py-3.5 rounded-xl text-[15px] font-medium
                          text-white bg-gradient-to-b from-brand-500 to-brand-600
                          shadow-[0_2px_24px_rgba(45,98,255,.35)]
                          hover:shadow-[0_4px_32px_rgba(45,98,255,.5)]
-                         hover:-translate-y-px transition-all">
+                         hover:-translate-y-px transition-all
+                         active:scale-[0.98]">
               Create free account <ArrowRight size={15} strokeWidth={2.2} />
             </Link>
             <Link to="/login"
-              className="inline-flex items-center gap-2 px-7 py-3.5 rounded-xl text-[15px] font-medium
-                         text-slate-400 hover:text-slate-200 transition-colors">
+              className="inline-flex items-center justify-center gap-2 px-7 py-3.5 rounded-xl text-[15px] font-medium
+                         text-slate-400 hover:text-slate-200 transition-colors
+                         active:scale-[0.98]">
               or sign in
             </Link>
           </div>
@@ -342,7 +444,9 @@ export default function LandingPage() {
 
       {/* ── Footer ─────────────────────────────────────────── */}
       <footer className="relative z-10 border-t border-white/[.04]">
-        <div className="max-w-6xl mx-auto px-6 py-8 flex items-center justify-between flex-wrap gap-4">
+        <div className="max-w-6xl mx-auto px-4 sm:px-6 py-6 sm:py-8
+                        flex flex-col sm:flex-row items-center justify-between
+                        text-center sm:text-left gap-2 sm:gap-4">
           <span className="font-display text-sm font-semibold text-slate-600">
             Crystal<span className="text-blue-400/50">PDF</span>
           </span>
diff --git a/frontend/src/pages/LoginPage.tsx b/frontend/src/pages/LoginPage.tsx
index c3bef4e..3d24258 100644
--- a/frontend/src/pages/LoginPage.tsx
+++ b/frontend/src/pages/LoginPage.tsx
@@ -53,7 +53,7 @@ export default function LoginPage() {
       <BrandPanel />
 
       {/* Form panel */}
-      <div className="flex-1 flex items-center justify-center p-8 bg-[#0c1829]">
+      <div className="flex-1 flex items-center justify-center px-4 py-8 sm:p-8 bg-[#0c1829]">
         <div className="w-full max-w-sm">
           {/* Mobile logo */}
           <div className="flex items-center gap-2.5 mb-10 lg:hidden">
@@ -61,7 +61,7 @@ export default function LoginPage() {
             <span className="text-white font-semibold tracking-wide text-sm">Crystal PDF</span>
           </div>
 
-          <h2 className="font-display text-4xl font-semibold text-white leading-tight">
+          <h2 className="font-display text-3xl sm:text-4xl font-semibold text-white leading-tight">
             Welcome<br /><em className="not-italic text-blue-400">back.</em>
           </h2>
           <p className="mt-2 text-slate-400 text-sm">Sign in to your account to continue.</p>
diff --git a/frontend/src/pages/RegisterPage.tsx b/frontend/src/pages/RegisterPage.tsx
index 125ab02..e95547e 100644
--- a/frontend/src/pages/RegisterPage.tsx
+++ b/frontend/src/pages/RegisterPage.tsx
@@ -49,7 +49,7 @@ export default function RegisterPage() {
       <BrandPanel />
 
       {/* Form panel */}
-      <div className="flex-1 flex items-center justify-center p-8 bg-[#0c1829]">
+      <div className="flex-1 flex items-center justify-center px-4 py-8 sm:p-8 bg-[#0c1829]">
         <div className="w-full max-w-sm">
           {/* Mobile logo */}
           <div className="flex items-center gap-2.5 mb-10 lg:hidden">
@@ -57,7 +57,7 @@ export default function RegisterPage() {
             <span className="text-white font-semibold tracking-wide text-sm">Crystal PDF</span>
           </div>
 
-          <h2 className="font-display text-4xl font-semibold text-white leading-tight">
+          <h2 className="font-display text-3xl sm:text-4xl font-semibold text-white leading-tight">
             Create your<br /><em className="not-italic text-blue-400">account.</em>
           </h2>
           <p className="mt-2 text-slate-400 text-sm">Free forever. No credit card required.</p>