diff --git a/src/App.vue b/src/App.vue
index b2626b1..4cbff0a 100644
--- a/src/App.vue
+++ b/src/App.vue
@@ -9,7 +9,8 @@ const {
   textInput,
   error,
   errorColor,
-  hasQr,
+  qrReady,
+  showModal,
   qrCanvasRef,
   qrFrameRef,
   generateQR,
@@ -26,12 +27,12 @@ const statusClass = computed(() =>
 )
 
 function onKeydown(event) {
-  if (event.key === 'Escape' && hasQr.value) {
+  if (event.key === 'Escape' && showModal.value) {
     closeQrModal()
   }
 }
 
-watch(hasQr, (open) => {
+watch(showModal, (open) => {
   document.body.style.overflow = open ? 'hidden' : ''
 })
 
@@ -84,12 +85,19 @@ onUnmounted(() => {
 
       <div class="btns btns1">
         <button class="btn" title="Создать QR-код" @click="generateQR">Создать</button>
-        <button class="btn" title="Скачать QR-код" @click="downloadQR">Скачать</button>
+        <button
+          class="btn"
+          title="Скачать QR-код"
+          :disabled="!qrReady"
+          @click="downloadQR"
+        >
+          Скачать
+        </button>
         <button class="btn3" title="Очистить поля" @click="clearQR">Очистить</button>
       </div>
 
       <div
-        v-if="!hasQr"
+        v-if="!showModal"
         class="status-slot"
         :class="{ 'status-slot--visible': error }"
       >
@@ -98,23 +106,23 @@ onUnmounted(() => {
         </Transition>
       </div>
     </div>
-  </main>
 
-  <a
-    href="https://github.com/IliaMiheev/iQR"
-    target="_blank"
-    rel="noopener noreferrer"
-    class="site-banner"
-    title="Репозиторий на GitHub"
-  >
-    <span class="site-banner__brand">iQR</span>
-    <span class="site-banner__slogan">— qr-код без излишеств</span>
-  </a>
+    <a
+      href="https://github.com/IliaMiheev/iQR"
+      target="_blank"
+      rel="noopener noreferrer"
+      class="site-banner"
+      title="Репозиторий на GitHub"
+    >
+      <span class="site-banner__brand">iQR</span>
+      <span class="site-banner__slogan">— qr-код без излишеств</span>
+    </a>
+  </main>
 
   <Teleport to="body">
     <Transition name="qr-modal">
       <div
-        v-if="hasQr"
+        v-if="showModal"
         class="qr-modal"
         role="dialog"
         aria-modal="true"
diff --git a/src/assets/style.css b/src/assets/style.css
index be476be..4b5d11d 100644
--- a/src/assets/style.css
+++ b/src/assets/style.css
@@ -72,10 +72,13 @@ body {
 .app-shell {
     max-width: 560px;
     margin: 0 auto;
+    width: 100%;
+    box-sizing: border-box;
 }
 
 .app-card {
     width: 100%;
+    box-sizing: border-box;
     padding: 28px 24px 32px;
     border-radius: 20px;
     background: var(--surface);
@@ -273,41 +276,6 @@ textarea::selection {
     font-weight: 600;
 }
 
-@media (max-width: 500px) {
-    .app-card {
-        padding: 20px 16px 24px;
-        border-radius: 16px;
-    }
-
-    .inputs {
-        flex-direction: column;
-        align-items: center;
-    }
-
-    textarea {
-        max-width: 100%;
-        width: 100%;
-        box-sizing: border-box;
-    }
-
-    .themeSwitch label {
-        margin-top: 0;
-    }
-
-    .btns {
-        max-width: 100%;
-    }
-
-    .btns1 {
-        grid-template-columns: 1fr 1fr;
-        grid-template-rows: auto auto;
-    }
-
-    .btn3 {
-        grid-column: 1 / -1;
-    }
-}
-
 button {
     padding: 11px 16px;
     margin: 0;
@@ -343,6 +311,19 @@ button {
     background-color: rgb(200, 55, 0);
 }
 
+.btn:disabled {
+    opacity: 0.45;
+    cursor: not-allowed;
+    box-shadow: none;
+    transform: none;
+}
+
+.btn:disabled:hover {
+    background-color: var(--accent);
+    transform: none;
+    box-shadow: none;
+}
+
 .btn3,
 .btns2 button {
     background: var(--surface-solid);
@@ -674,12 +655,15 @@ canvas {
     transform: translateX(-50%);
     display: inline-flex;
     align-items: center;
-    gap: 6px;
+    justify-content: center;
+    flex-wrap: wrap;
+    gap: 4px 6px;
     padding: 10px 22px;
     border-radius: 999px;
     text-decoration: none;
     font-size: 15px;
-    line-height: 1.2;
+    line-height: 1.35;
+    text-align: center;
     white-space: nowrap;
     z-index: 10;
     backdrop-filter: blur(12px);
@@ -691,6 +675,11 @@ canvas {
         box-shadow 0.35s ease;
 }
 
+.site-banner__brand,
+.site-banner__slogan {
+    display: inline;
+}
+
 html.dark .site-banner {
     background-color: rgba(30, 30, 30, 0.72);
     color: #f5f5f5;
@@ -723,14 +712,106 @@ html.light .site-banner:hover {
     font-weight: 400;
 }
 
-@media (max-width: 500px) {
+/* Портрет <425px и альбомная ориентация на телефонах */
+@media (max-width: 424px),
+       (orientation: landscape) and (max-height: 520px) {
+    body {
+        padding: 16px;
+        display: flex;
+        flex-direction: column;
+        min-height: 100dvh;
+        overflow-x: hidden;
+    }
+
+    #app {
+        flex: 1;
+        display: flex;
+        flex-direction: column;
+    }
+
+    .app-shell {
+        flex: 1;
+        display: flex;
+        flex-direction: column;
+        align-items: stretch;
+        gap: 16px;
+        min-height: calc(100dvh - 32px);
+    }
+
+    .app-card {
+        flex-shrink: 0;
+    }
+
+    .site-banner {
+        position: static;
+        left: auto;
+        bottom: auto;
+        transform: none;
+        margin-top: auto;
+        padding: 10px 18px;
+        align-self: center;
+        max-width: 100%;
+        white-space: normal;
+        font-size: 14px;
+        flex-shrink: 0;
+    }
+}
+
+@media (max-width: 424px) {
+    .app-card {
+        padding: 20px 16px 24px;
+        border-radius: 16px;
+    }
+
+    .inputs {
+        flex-direction: column;
+        align-items: stretch;
+        width: 100%;
+    }
+
+    textarea {
+        max-width: 100%;
+        width: 100%;
+        box-sizing: border-box;
+    }
+
+    .themeSwitch {
+        align-self: center;
+    }
+
+    .themeSwitch label {
+        margin-top: 0;
+    }
+
+    .btns {
+        max-width: 100%;
+    }
+
+    .btns1 {
+        grid-template-columns: 1fr 1fr;
+        grid-template-rows: auto auto;
+    }
+
+    .btn3 {
+        grid-column: 1 / -1;
+    }
+
+    h1 {
+        font-size: 1.35rem;
+    }
+
     .qr-modal {
         padding: 16px;
+        padding-bottom: 80px;
+        align-items: flex-start;
     }
 
     .qr-modal__dialog {
         padding: 16px;
         border-radius: 20px;
+        margin: 0 auto;
+        max-width: calc(100vw - 32px);
+        max-height: calc(100dvh - 120px);
     }
 
     .qr-modal__close {
@@ -738,14 +819,63 @@ html.light .site-banner:hover {
         right: -10px;
     }
 
-    .qr-modal__toolbar {
-        right: 12px;
+    .qr-modal__viewport {
+        max-height: calc(100dvh - 200px);
     }
 
-    .site-banner {
-        max-width: calc(100% - 32px);
-        white-space: normal;
-        text-align: center;
-        font-size: 14px;
+    .qr-modal__toolbar {
+        right: auto;
+        left: 50%;
+        top: auto;
+        bottom: max(16px, env(safe-area-inset-bottom, 16px));
+        transform: translateX(-50%);
+        flex-direction: row;
+        padding: 8px 12px;
+        gap: 8px;
+        border-radius: 999px;
+    }
+
+    .qr-modal-enter-from .qr-modal__toolbar,
+    .qr-modal-leave-to .qr-modal__toolbar {
+        opacity: 0;
+        transform: translateX(-50%) translateY(20px);
+    }
+}
+
+@media (max-width: 424px),
+       (orientation: landscape) and (max-height: 520px) {
+    .qr-modal {
+        padding: 12px;
+        padding-bottom: 72px;
+        align-items: flex-start;
+    }
+
+    .qr-modal__dialog {
+        padding: 14px;
+        margin: 0 auto;
+        max-width: calc(100vw - 24px);
+        max-height: calc(100dvh - 96px);
+    }
+
+    .qr-modal__viewport {
+        max-height: calc(100dvh - 160px);
+    }
+
+    .qr-modal__toolbar {
+        right: auto;
+        left: 50%;
+        top: auto;
+        bottom: max(12px, env(safe-area-inset-bottom, 12px));
+        transform: translateX(-50%);
+        flex-direction: row;
+        padding: 8px 12px;
+        gap: 8px;
+        border-radius: 999px;
+    }
+
+    .qr-modal-enter-from .qr-modal__toolbar,
+    .qr-modal-leave-to .qr-modal__toolbar {
+        opacity: 0;
+        transform: translateX(-50%) translateY(20px);
     }
 }
diff --git a/src/composables/useQrCode.js b/src/composables/useQrCode.js
index 90e3e34..53a5137 100644
--- a/src/composables/useQrCode.js
+++ b/src/composables/useQrCode.js
@@ -11,7 +11,9 @@ export function useQrCode() {
   const error = ref('')
   const errorColor = ref('red')
   const scale = ref(1)
-  const hasQr = ref(false)
+  const qrReady = ref(false)
+  const showModal = ref(false)
+  const qrDataUrl = ref('')
   const qrCanvasRef = ref(null)
   const qrFrameRef = ref(null)
 
@@ -39,6 +41,7 @@ export function useQrCode() {
 
     const width = Math.round(BASE_QR_SIZE * scale.value)
     await QRCode.toCanvas(canvas, userText, { width })
+    qrDataUrl.value = canvas.toDataURL('image/png')
   }
 
   async function clampScaleIfNeeded() {
@@ -58,36 +61,38 @@ export function useQrCode() {
     }
 
     localStorage.setItem('userText', userText)
-    hasQr.value = true
+    showModal.value = true
 
     await nextTick()
 
     try {
       await renderQrCanvas()
+      qrReady.value = true
       logMessage('')
       await clampScaleIfNeeded()
     } catch (err) {
       console.error(err)
       logMessage('Ошибка при генерации QR-кода.')
-      hasQr.value = false
+      showModal.value = false
+      qrReady.value = false
+      qrDataUrl.value = ''
     }
   }
 
   function downloadQR() {
     const userText = textInput.value.slice(0, 20)
-    const canvas = qrCanvasRef.value
 
-    if (!canvas) {
-      logMessage('QR-код не сгенерирован!')
-      return
-    }
     if (!userText) {
       logMessage('Отсутствует текст в поле для ввода')
       return
     }
+    if (!qrReady.value || !qrDataUrl.value) {
+      logMessage('QR-код не сгенерирован!')
+      return
+    }
 
     const link = document.createElement('a')
-    link.href = canvas.toDataURL('image/png')
+    link.href = qrDataUrl.value
     link.download = `qr-code-${userText}.png`
     link.click()
     logMessage('QR-код скачан!', 'green')
@@ -95,7 +100,9 @@ export function useQrCode() {
 
   function clearQR() {
     textInput.value = ''
-    hasQr.value = false
+    showModal.value = false
+    qrReady.value = false
+    qrDataUrl.value = ''
     error.value = ''
     scale.value = 1
     localStorage.removeItem('userText')
@@ -103,7 +110,7 @@ export function useQrCode() {
   }
 
   function closeQrModal() {
-    hasQr.value = false
+    showModal.value = false
   }
 
   async function zoomIn() {
@@ -162,7 +169,8 @@ export function useQrCode() {
     textInput,
     error,
     errorColor,
-    hasQr,
+    qrReady,
+    showModal,
     qrCanvasRef,
     qrFrameRef,
     generateQR,
diff --git a/vite.config.js b/vite.config.js
index 29c95b1..755bfa6 100644
--- a/vite.config.js
+++ b/vite.config.js
@@ -4,4 +4,7 @@ import vue from '@vitejs/plugin-vue'
 export default defineConfig({
   plugins: [vue()],
   base: '/',
+  server: {
+    host: true,
+  },
 })