Frontend improvements

frontend/style.css

@@ -15,10 +15,19 @@ body {
   padding: 24px;
 }
 
+.page-content {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  width: 100%;
+  max-width: 640px;
+}
+
 h1 {
   font-size: clamp(32px, 4vw, 48px);
-  margin-bottom: 32px;
   text-align: center;
+  margin: 0 0 32px 0;
+  width: 100%;
 }
 
 .upload-container {
@@ -42,6 +51,14 @@ h1 {
   background: rgba(99, 102, 241, 0.04);
   cursor: pointer;
   position: relative;
+  display: block;
+  overflow: hidden;
+}
+
+.dropzone:focus,
+.dropzone:focus-within {
+  outline: none;
+  border: 2px dashed #6366f1;
 }
 
 .dropzone.dragover {
@@ -52,9 +69,43 @@ h1 {
 
 .dropzone input[type="file"] {
   position: absolute;
-  inset: 0;
+  top: 0;
+  left: 0;
+  width: 100%;
+  height: 100%;
   opacity: 0;
   cursor: pointer;
+  outline: none !important;
+  border: none !important;
+  box-shadow: none !important;
+  -webkit-appearance: none !important;
+  -moz-appearance: none !important;
+  appearance: none !important;
+  margin: 0 !important;
+  padding: 0 !important;
+  background: transparent !important;
+  font-size: 0 !important;
+  line-height: 0 !important;
+  z-index: 1;
+}
+
+.dropzone input[type="file"]:focus,
+.dropzone input[type="file"]:active,
+.dropzone input[type="file"]:hover,
+.dropzone input[type="file"]:focus-visible,
+.dropzone input[type="file"]::-webkit-file-upload-button {
+  outline: none !important;
+  border: none !important;
+  box-shadow: none !important;
+  -webkit-appearance: none !important;
+  -moz-appearance: none !important;
+  appearance: none !important;
+}
+
+.dropzone input[type="file"]::-webkit-file-upload-button {
+  display: none !important;
+  visibility: hidden !important;
+  opacity: 0 !important;
 }
 
 .dropzone p {
@@ -92,12 +143,23 @@ button:disabled {
   box-shadow: none;
 }
 
+.button-container {
+  display: flex;
+  justify-content: center;
+  width: 100%;
+  margin-top: 24px;
+}
+
 .status {
-  min-height: 24px;
   font-size: 15px;
   color: #374151;
   line-height: 1.5;
   word-break: break-all;
+  min-height: 0;
+}
+
+.status:empty {
+  display: none;
 }
 
 .status.error {
@@ -148,3 +210,122 @@ button:disabled {
 .download-button:active {
   transform: translateY(0);
 }
+
+/* Error popup */
+.error-popup {
+  position: fixed;
+  top: 20px;
+  left: 50%;
+  transform: translateX(-50%);
+  background: #fee2e2;
+  border: 2px solid #dc2626;
+  border-radius: 12px;
+  padding: 16px 24px;
+  color: #991b1b;
+  font-weight: 600;
+  font-size: 15px;
+  z-index: 1000;
+  box-shadow: 0 10px 25px -5px rgba(220, 38, 38, 0.3);
+  animation: slideDown 0.3s ease-out;
+  max-width: 90%;
+  text-align: center;
+}
+
+@keyframes slideDown {
+  from {
+    opacity: 0;
+    transform: translateX(-50%) translateY(-20px);
+  }
+  to {
+    opacity: 1;
+    transform: translateX(-50%) translateY(0);
+  }
+}
+
+/* Success content */
+.success-content {
+  animation: fadeIn 0.3s ease-in;
+}
+
+@keyframes fadeIn {
+  from {
+    opacity: 0;
+  }
+  to {
+    opacity: 1;
+  }
+}
+
+.download-link-container {
+  display: flex;
+  gap: 12px;
+  margin-top: 24px;
+  align-items: center;
+  justify-content: center;
+  flex-wrap: wrap;
+}
+
+.download-link-input {
+  flex: 1;
+  min-width: 200px;
+  padding: 12px 16px;
+  border: 2px solid #e5e7eb;
+  border-radius: 8px;
+  font-size: 14px;
+  font-family: monospace;
+  background: #f9fafb;
+  color: #111827;
+  cursor: text;
+}
+
+.download-link-input:focus {
+  outline: none;
+  border-color: #6366f1;
+  background: #ffffff;
+}
+
+.copy-link-button {
+  padding: 12px 24px;
+  background: linear-gradient(135deg, #10b981, #059669);
+  color: white;
+  border: none;
+  border-radius: 8px;
+  font-size: 14px;
+  font-weight: 600;
+  cursor: pointer;
+  transition: transform 0.2s ease, box-shadow 0.2s ease;
+  white-space: nowrap;
+}
+
+.copy-link-button:hover {
+  transform: translateY(-1px);
+  box-shadow: 0 8px 16px -4px rgba(16, 185, 129, 0.4);
+}
+
+.copy-link-button:active {
+  transform: translateY(0);
+}
+
+.copy-link-button.copied {
+  background: linear-gradient(135deg, #6366f1, #8b5cf6);
+}
+
+.upload-another-button {
+  margin-top: 24px;
+  padding: 12px 24px;
+  background: transparent;
+  color: #6366f1;
+  border: 2px solid #6366f1;
+  border-radius: 8px;
+  font-size: 14px;
+  font-weight: 600;
+  cursor: pointer;
+  transition: all 0.2s ease;
+}
+
+.upload-another-button:hover {
+  background: #6366f1;
+  color: white;
+  transform: translateY(-1px);
+  box-shadow: 0 8px 16px -4px rgba(99, 102, 241, 0.4);
+}