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style.css

@@ -1,76 +1,426 @@
 * {
-    box-sizing: border-box;
-    padding: 0;
-    margin: 0;
-    font-family: sans-serif;
+margin: 0;
+padding: 0;
+box-sizing: border-box;
 }
 
-html,
-body {
-    height: 100%;
+:root {
+/* Apple iOS colors */
+--blue: #007AFF;
+--blue-dark: #0051D5;
+--gray: #8E8E93;
+--gray-light: #C7C7CC;
+--gray-lighter: #E5E5EA;
+--gray-lightest: #F2F2F7;
+--white: #FFFFFF;
+--black: #000000;
+--text-primary: #000000;
+--text-secondary: #3C3C43;
+--text-tertiary: #8E8E93;
+--separator: rgba(60, 60, 67, 0.36);
+--fill-tertiary: rgba(118, 118, 128, 0.12);
+}
+
+@media (prefers-color-scheme: dark) {
+:root {
+--blue: #0A84FF;
+--gray-lightest: #1C1C1E;
+--gray-lighter: #2C2C2E;
+--gray-light: #48484A;
+--gray: #8E8E93;
+--white: #000000;
+--black: #FFFFFF;
+--text-primary: #FFFFFF;
+--text-secondary: #EBEBF5;
+--text-tertiary: #8E8E93;
+--separator: rgba(84, 84, 88, 0.65);
+--fill-tertiary: rgba(118, 118, 128, 0.24);
+}
 }
 
 body {
-    padding: 32px;
+font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text', 'Helvetica Neue', sans-serif;
+background: var(--gray-lightest);
+color: var(--text-primary);
+line-height: 1.47059;
+font-size: 17px;
+overflow: hidden;
+-webkit-font-smoothing: antialiased;
+-moz-osx-font-smoothing: grayscale;
+}
+
+.container {
+max-width: 980px;
+margin: 0 auto;
+height: 100vh;
+display: flex;
+flex-direction: column;
+background: var(--white);
+}
+
+.header {
+background: var(--white);
+padding: 20px 20px 16px;
+border-bottom: 0.5px solid var(--separator);
+backdrop-filter: saturate(180%) blur(20px);
+-webkit-backdrop-filter: saturate(180%) blur(20px);
+}
+
+.header-content {
+text-align: center;
+margin-bottom: 12px;
+}
+
+.title {
+font-size: 28px;
+font-weight: 700;
+letter-spacing: -0.5px;
+margin-bottom: 2px;
+color: var(--text-primary);
+}
+
+.subtitle {
+font-size: 13px;
+color: var(--text-secondary);
+font-weight: 400;
+letter-spacing: -0.08px;
+}
+
+.built-with {
+display: inline-block;
+color: var(--blue);
+text-decoration: none;
+font-size: 13px;
+padding: 6px 12px;
+background: var(--fill-tertiary);
+border-radius: 12px;
+transition: all 0.2s ease;
+font-weight: 500;
+}
+
+.built-with:hover {
+background: var(--gray-lighter);
+transform: scale(1.02);
+}
+
+.built-with:active {
+transform: scale(0.98);
+}
+
+.chat-container {
+flex: 1;
+display: flex;
+flex-direction: column;
+overflow: hidden;
+}
+
+.messages-container {
+flex: 1;
+overflow-y: auto;
+padding: 20px;
+scroll-behavior: smooth;
+}
+
+.messages-container::-webkit-scrollbar {
+width: 6px;
+}
+
+.messages-container::-webkit-scrollbar-track {
+background: transparent;
+}
+
+.messages-container::-webkit-scrollbar-thumb {
+background: var(--gray-light);
+border-radius: 3px;
+}
+
+.welcome-message {
+text-align: center;
+padding: 60px 20px;
+}
+
+.welcome-icon {
+margin-bottom: 20px;
+animation: gentle-bounce 2s ease-in-out infinite;
+}
+
+@keyframes gentle-bounce {
+0%, 100% { transform: translateY(0); }
+50% { transform: translateY(-8px); }
+}
+
+.welcome-message h2 {
+font-size: 22px;
+font-weight: 600;
+letter-spacing: -0.4px;
+margin-bottom: 8px;
+color: var(--text-primary);
+}
+
+.welcome-message p {
+font-size: 15px;
+color: var(--text-secondary);
+max-width: 400px;
+margin: 0 auto;
+line-height: 1.4;
+}
+
+.message {
+display: flex;
+margin-bottom: 16px;
+animation: message-appear 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
+}
+
+@keyframes message-appear {
+from {
+opacity: 0;
+transform: translateY(8px);
+}
+to {
+opacity: 1;
+transform: translateY(0);
+}
+}
+
+.message.user {
+justify-content: flex-end;
+}
+
+.message-content {
+max-width: 70%;
+padding: 12px 16px;
+border-radius: 18px;
+font-size: 15px;
+line-height: 1.4;
+word-wrap: break-word;
+position: relative;
 }
 
-body,
-#container {
-    display: flex;
-    flex-direction: column;
-    justify-content: center;
-    align-items: center;
+.message.user .message-content {
+background: var(--blue);
+color: white;
+border-bottom-right-radius: 4px;
 }
 
-#container {
-    position: relative;
-    gap: 0.4rem;
+.message.assistant .message-content {
+background: var(--gray-lighter);
+color: var(--text-primary);
+border-bottom-left-radius: 4px;
+}
+
+.typing-indicator {
+display: flex;
+gap: 4px;
+padding: 12px 16px;
+align-items: center;
+}
+
+.typing-dot {
+width: 8px;
+height: 8px;
+background: var(--gray);
+border-radius: 50%;
+animation: typing-animation 1.4s infinite;
+}
+
+.typing-dot:nth-child(2) {
+animation-delay: 0.2s;
+}
+
+.typing-dot:nth-child(3) {
+animation-delay: 0.4s;
+}
+
+@keyframes typing-animation {
+0%, 60%, 100% {
+transform: translateY(0);
+opacity: 0.5;
+}
+30% {
+transform: translateY(-6px);
+opacity: 1;
+}
+}
+
+.input-container {
+padding: 8px 16px 20px;
+background: var(--white);
+border-top: 0.5px solid var(--separator);
+}
+
+.input-wrapper {
+display: flex;
+gap: 8px;
+align-items: flex-end;
+background: var(--gray-lightest);
+border-radius: 20px;
+padding: 8px 8px 8px 16px;
+border: 1px solid var(--separator);
+transition: all 0.2s ease;
+}
+
+.input-wrapper:focus-within {
+border-color: var(--blue);
+background: var(--white);
+}
+
+#userInput {
+flex: 1;
+border: none;
+background: transparent;
+padding: 4px 0;
+font-size: 17px;
+font-family: inherit;
+resize: none;
+max-height: 120px;
+outline: none;
+color: var(--text-primary);
+line-height: 1.4;
+}
+
+#userInput::placeholder {
+color: var(--text-tertiary);
+}
+
+.send-btn {
+width: 32px;
+height: 32px;
+border: none;
+background: var(--blue);
+color: white;
+border-radius: 50%;
+cursor: pointer;
+display: flex;
+align-items: center;
+justify-content: center;
+transition: all 0.2s ease;
+flex-shrink: 0;
+}
 
-    width: 640px;
-    height: 640px;
-    max-width: 100%;
-    max-height: 100%;
+.send-btn:hover:not(:disabled) {
+background: var(--blue-dark);
+transform: scale(1.05);
+}
+
+.send-btn:active:not(:disabled) {
+transform: scale(0.95);
+}
 
-    border: 2px dashed #D1D5DB;
-    border-radius: 0.75rem;
-    overflow: hidden;
-    cursor: pointer;
-    margin: 1rem;
+.send-btn:disabled {
+background: var(--gray-light);
+cursor: not-allowed;
+opacity: 0.4;
+}
 
-    background-size: 100% 100%;
-    background-position: center;
-    background-repeat: no-repeat;
-    font-size: 18px;
+.status {
+margin-top: 8px;
+text-align: center;
+font-size: 13px;
+color: var(--text-tertiary);
 }
 
-#upload {
-    display: none;
+.loading-overlay {
+position: fixed;
+top: 0;
+left: 0;
+right: 0;
+bottom: 0;
+background: rgba(0, 0, 0, 0.4);
+backdrop-filter: saturate(180%) blur(20px);
+-webkit-backdrop-filter: saturate(180%) blur(20px);
+display: flex;
+align-items: center;
+justify-content: center;
+z-index: 1000;
 }
 
-svg {
-    pointer-events: none;
+.loading-overlay.hidden {
+display: none;
 }
 
-#example {
-    font-size: 14px;
-    text-decoration: underline;
-    cursor: pointer;
+.loading-content {
+background: var(--white);
+padding: 40px;
+border-radius: 20px;
+text-align: center;
+max-width: 360px;
+box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
 }
 
-#example:hover {
-    color: #2563EB;
+.loading-spinner {
+width: 50px;
+height: 50px;
+border: 3px solid var(--gray-lighter);
+border-top-color: var(--blue);
+border-radius: 50%;
+animation: spin 0.8s linear infinite;
+margin: 0 auto 24px;
 }
 
-.bounding-box {
-    position: absolute;
-    box-sizing: border-box;
-    border: solid 2px;
+@keyframes spin {
+to { transform: rotate(360deg); }
 }
 
-.bounding-box-label {
-    color: white;
-    position: absolute;
-    font-size: 12px;
-    margin: -16px 0 0 -2px;
-    padding: 1px;
+.loading-content h3 {
+font-size: 22px;
+margin-bottom: 8px;
+font-weight: 600;
+letter-spacing: -0.4px;
+color: var(--text-primary);
+}
+
+.loading-content p {
+color: var(--text-secondary);
+margin-bottom: 20px;
+font-size: 15px;
+}
+
+.progress-bar {
+width: 100%;
+height: 4px;
+background: var(--gray-lighter);
+border-radius: 2px;
+overflow: hidden;
+margin-bottom: 8px;
+}
+
+.progress-fill {
+height: 100%;
+background: var(--blue);
+width: 0%;
+transition: width 0.3s ease;
+border-radius: 2px;
+}
+
+.progress-text {
+font-size: 13px;
+color: var(--text-tertiary);
+font-weight: 500;
+}
+
+@media (max-width: 768px) {
+.container {
+max-width: 100%;
+}
+
+.header {
+padding: 16px;
+}
+
+.title {
+font-size: 24px;
+}
+
+.messages-container {
+padding: 16px;
+}
+
+.message-content {
+max-width: 80%;
+}
+
+.loading-content {
+margin: 20px;
+padding: 32px;
+}
 }