:root {
  --primary-color: #0071E3;
  --secondary-color: #F5F5F7;
  --text-color: #1D1D1F;
  --light-text: #86868B;
  --border-color: #CFCFCF;
  --success-color: #34C759;
  --error-color: #FF3B30;
  --background-gradient: linear-gradient(135deg, #F5F5F7 0%, #FFFFFF 100%);
  --spacing: 24px;
  --message-radius: 18px;
  --bot-message-bg: white;
  --user-message-bg: #0071E3;
  --chat-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'SF Pro Display', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--background-gradient);
  color: var(--text-color);
  min-height: 100vh;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
  height: 100vh;
  display: flex;
  flex-direction: column;
}

h1, h2, h3 {
  font-weight: 600;
}

/* Header with back button */
.app-header {
  text-align: center;
  margin-bottom: 2rem;
}

.header-content {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem;
}

.logo-container {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.back-button {
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--primary-color);
  font-weight: 500;
  text-decoration: none;
  padding: 8px 12px;
  border-radius: 8px;
  transition: all 0.2s ease;
  background-color: rgba(0, 113, 227, 0.08);
}

.back-button:hover {
  background-color: rgba(0, 113, 227, 0.15);
  transform: translateY(-50%) translateX(-4px);
}

.back-button svg {
  transition: transform 0.2s ease;
}

.back-button:hover svg {
  transform: translateX(-2px);
}

.app-header .logo {
  height: 140px;
  width: auto;
  margin-bottom: 0.5rem;
}

.app-header h1 {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
  background: linear-gradient(to right, var(--error-color), #FF6B6B);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  display: inline-block;
}

.subtitle {
  font-size: 1.25rem;
  color: var(--light-text);
  max-width: 600px;
  margin: 0 auto;
}

/* Upload Container */
.upload-container {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  flex: 1;
  justify-content: flex-start;
  min-height: auto;
}

.upload-sections-wrapper {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  justify-content: center;
}

@media (min-width: 768px) {
  .upload-sections-wrapper {
    flex-direction: row;
    align-items: flex-start;
    justify-content: center;
    gap: 3rem;
  }
  
  .upload-section {
    flex: 0 1 500px;
    max-width: 500px;
  }
}

.upload-section {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.upload-box {
  background: white;
  border-radius: 16px;
  padding: 2rem;
  text-align: center;
  border: 2px dashed var(--border-color);
  transition: all 0.3s ease;
  cursor: pointer;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
}

.upload-box:hover {
  border-color: var(--primary-color);
}

.upload-box.drag-over {
  border-color: var(--primary-color);
  background-color: rgba(0, 113, 227, 0.05);
  transform: scale(1.01);
}

.upload-icon {
  color: var(--primary-color);
  margin-bottom: 1rem;
}

.upload-box h2 {
  margin-bottom: 0.5rem;
  font-size: 1.5rem;
}

.upload-box p {
  color: var(--light-text);
  margin-bottom: 1.5rem;
  font-size: 0.9rem;
}

.select-files-btn {
  background: var(--secondary-color);
  color: var(--text-color);
  font-weight: 500;
  border: none;
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
  font-size: 0.9rem;
}

.select-files-btn:hover {
  background: #E5E5EA;
}

/* Files Preview */
.files-preview {
  background: white;
  border-radius: 16px;
  padding: 1.5rem;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
}

.files-preview h3 {
  font-size: 1rem;
  margin-bottom: 1rem;
  color: var(--light-text);
}

.files-list {
  list-style: none;
}

.files-list li {
  display: flex;
  align-items: center;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--secondary-color);
}

.files-list li:last-child {
  border-bottom: none;
}

.file-icon {
  margin-right: 0.75rem;
  color: var(--primary-color);
}

.file-name {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.file-remove {
  color: var(--error-color);
  background: transparent;
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
}

.file-remove:hover {
  transform: scale(1.1);
}

/* Generate Button Container */
.generate-button-container {
  padding: 1rem 0;
  display: flex;
  justify-content: center;
  width: 100%;
}

.generate-btn {
  background: var(--primary-color);
  color: white;
  font-weight: 600;
  font-size: 1.1rem;
  padding: 1rem 2rem;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  width: 100%;
  max-width: 300px;
}

.generate-btn:hover {
  background: #005BBF;
  transform: translateY(-2px);
  box-shadow: 0 6px 12px rgba(0, 113, 227, 0.2);
}

.generate-btn:disabled {
  background: #CFCFCF;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

/* Progress Bar Styles */
.progress-container {
  width: 100%;
  max-width: 300px;
  margin: 20px auto;
  display: none;
}

.progress-bar-container {
  width: 100%;
  height: 8px;
  background-color: var(--secondary-color);
  border-radius: 10px;
  overflow: hidden;
  margin-bottom: 10px;
}

.progress-bar {
  height: 100%;
  background-color: var(--primary-color);
  width: 0%;
  border-radius: 10px;
  transition: width 0.3s ease;
}

.progress-text {
  text-align: center;
  color: var(--light-text);
  font-size: 0.9rem;
  margin-top: 0.5rem;
}

/* Chat Page - Modernized Design */
.chat-container {
  display: flex;
  flex-direction: column;
  height: 100%;
  max-width: 1000px;
  margin: 0 auto;
  width: 100%;
  padding-top: 2rem;
  animation: fadeIn 0.4s ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.chat-header {
  text-align: center;
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid rgba(207, 207, 207, 0.5);
  position: relative;
}

.chat-header h1 {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
  color: var(--text-color);
}

.chat-header p {
  color: var(--light-text);
  font-size: 0.95rem;
}

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 1.5rem 0;
  display: flex;
  flex-direction: column;
  gap: 2rem;
  min-height: 400px;
  max-height: 70vh;
  scroll-behavior: smooth;
}

.message {
  display: flex;
  align-items: flex-start;
  max-width: 85%;
  animation: messageSlideIn 0.3s ease-out;
}

@keyframes messageSlideIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.user-message {
  align-self: flex-end;
  margin-right: 1rem;
}

.message-avatar {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  margin: 0 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--secondary-color);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.05);
}

.message-content {
  background: var(--bot-message-bg);
  padding: 1.25rem;
  border-radius: var(--message-radius);
  box-shadow: var(--chat-shadow);
  transition: all 0.2s ease;
  max-width: 100%;
  overflow: hidden;
}

.user-message .message-content {
  background: var(--user-message-bg);
  color: white;
  border-radius: var(--message-radius);
  margin-left: auto;
  box-shadow: 0 8px 16px rgba(0, 113, 227, 0.2);
}

.message-text {
  font-size: 0.95rem;
  line-height: 1.6;
  overflow-wrap: break-word;
  word-wrap: break-word;
}

.message-text h3 {
  margin-bottom: 0.75rem;
  font-size: 1.1rem;
}

.message-text p, .message-text ul, .message-text ol {
  margin-bottom: 1rem;
}

.message-text p:last-child, .message-text ul:last-child, .message-text ol:last-child {
  margin-bottom: 0;
}

.message-text ul, .message-text ol {
  padding-left: 1.25rem;
}

.message-time {
  font-size: 0.75rem;
  color: var(--light-text);
  margin-top: 0.75rem;
  text-align: right;
  opacity: 0.8;
}

.user-message .message-time {
  color: rgba(255, 255, 255, 0.9);
}

.chat-input-form {
  display: flex;
  gap: 1rem;
  margin:2rem 0;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(207, 207, 207, 0.5);
  position: relative;
}

.chat-input-form::before {
  content: "";
  position: absolute;
  top: -20px;
  left: 0;
  right: 0;
  height: 40px;
  background: linear-gradient(to bottom, rgba(245, 245, 247, 0), var(--secondary-color));
  pointer-events: none;
  opacity: 0.7;
  z-index: -1;
}

.chat-input-form input {
  flex: 1;
  padding: 1rem 1.5rem;
  border: 1px solid var(--border-color);
  border-radius: 18px;
  background: white;
  font-size: 1rem;
  transition: all 0.2s ease;
  font-family: inherit;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.chat-input-form input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(0, 113, 227, 0.15);
}

.chat-input-form button {
  padding: 1rem;
  background: var(--primary-color);
  color: white;
  border: none;
  border-radius: 50%;
  width: 50px;
  height: 50px;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 10px rgba(0, 113, 227, 0.3);
}

.chat-input-form button:hover {
  background: #005BBF;
  transform: scale(1.05);
}

/* Typing animation - modernized */
.typing-indicator {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 1rem;
}

.typing-indicator span {
  height: 8px;
  width: 8px;
  margin: 0 2px;
  background-color: var(--primary-color);
  display: block;
  border-radius: 50%;
  opacity: 0.4;
  animation: typingModern 1.4s infinite ease-in-out;
}

.typing-indicator span:nth-child(1) {
  animation-delay: 0s;
}

.typing-indicator span:nth-child(2) {
  animation-delay: 0.2s;
}

.typing-indicator span:nth-child(3) {
  animation-delay: 0.4s;
}

@keyframes typingModern {
  0% {
    transform: translateY(0px);
    opacity: 0.4;
  }
  50% {
    transform: translateY(-6px);
    opacity: 0.8;
  }
  100% {
    transform: translateY(0px);
    opacity: 0.4;
  }
}

/* Responsive */
@media (max-width: 767px) {
  .container {
    padding: 1rem;
  }
  
  .app-header {
    margin-bottom: 1.5rem;
  }
  
  .app-header h1 {
    font-size: 2rem;
  }
  
  .subtitle {
    font-size: 1rem;
  }
  
  .message {
    max-width: 90%;
  }
  
  .app-header .logo {
    height: 100px;
  }
}

/* Chat Header */
.chat-header .logo {
  height: 80px;
  width: auto;
}

@media (max-width: 767px) {
  .chat-header .logo {
    height: 50px;
  }
}

.files-list li.error {
  color: var(--error-color);
  padding: 10px;
  border-radius: 8px;
  background-color: rgba(255, 59, 48, 0.1);
  border-left: 3px solid var(--error-color);
}

.files-list li.error small {
  display: block;
  margin-top: 8px;
  color: var(--light-text);
  font-size: 0.85rem;
  line-height: 1.4;
}

/* Estilos para tablas de datos - modernizados con scroll horizontal */
.table-responsive {
  overflow-x: auto;
  max-width: 100%;
  max-height: 60vh;
  margin: 1.5rem 0;
  border-radius: 12px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
  background: white;
  -webkit-overflow-scrolling: touch;
}

.data-table {
  width: 100%;
  min-width: 600px;
  border-collapse: collapse;
  font-size: 0.9rem;
  background-color: white;
  table-layout: auto;
  margin: 0;
}

.data-table th,
.data-table td {
  padding: 12px 16px;
  text-align: left;
  border: 1px solid rgba(207, 207, 207, 0.3);
}

.data-table th {
  background-color: #f8f8fa;
  font-weight: 600;
  position: sticky;
  top: 0;
  z-index: 1;
  color: #1D1D1F;
  box-shadow: 0 1px 0 rgba(0,0,0,0.08);
}

.data-table tr:nth-child(even) {
  background-color: #fcfcfc;
}

.data-table tr:hover {
  background-color: #f5f9ff;
}

/* Ajustes para pantallas pequeñas */
@media (max-width: 768px) {
  .data-table {
    font-size: 0.8rem;
  }
  
  .data-table th,
  .data-table td {
    padding: 10px 8px;
  }
}

.message-actions {
  display: flex;
  justify-content: flex-end;
  margin-top: 1.25rem;
}

.download-excel-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  background-color: #1D6F42; /* Color verde de Excel */
  color: white;
  border: none;
  border-radius: 8px;
  padding: 10px 16px;
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 0 4px 10px rgba(29, 111, 66, 0.25);
}

.download-excel-btn:hover {
  background-color: #185a36;
  transform: translateY(-2px);
  box-shadow: 0 6px 14px rgba(29, 111, 66, 0.35);
}

.download-excel-btn:active {
  transform: translateY(0);
  box-shadow: 0 2px 6px rgba(29, 111, 66, 0.25);
}

.download-excel-btn svg {
  width: 16px;
  height: 16px;
  transition: transform 0.2s ease;
}

.download-excel-btn:hover svg {
  transform: translateY(2px);
}

/* Estilos para la página de login */
.login-page {
  background: var(--background-gradient);
  height: 100vh;
  width: 100vw;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: fixed;
  top: 0;
  left: 0;
}

.login-container {
  width: 100%;
  max-width: 420px;
  padding: 1rem;
  margin: 0 auto;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.login-card {
  background: white;
  border-radius: 24px;
  padding: 2rem;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
  animation: fadeInUp 0.6s ease-out;
  width: 100%;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
}

.login-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  flex: 1;
}

.login-header {
  text-align: center;
  margin-bottom: 1.5rem;
}

.login-logo {
  height: 80px;
  width: auto;
  margin-bottom: 1rem;
  animation: fadeInDown 0.6s ease-out;
}

.login-header h2 {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
  color: var(--text-color);
}

.login-header p {
  color: var(--light-text);
  font-size: 0.9rem;
}

.login-error {
  background: rgba(255, 59, 48, 0.1);
  border: 1px solid rgba(255, 59, 48, 0.2);
  color: var(--error-color);
  padding: 0.75rem;
  border-radius: 12px;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.85rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-group label {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-color);
}

.input-icon-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.input-icon-wrapper svg {
  position: absolute;
  left: 1rem;
  color: var(--light-text);
}

.input-icon-wrapper input {
  width: 100%;
  padding: 0.75rem 1rem 0.75rem 3rem;
  border: 1px solid var(--border-color);
  border-radius: 12px;
  font-size: 0.95rem;
  transition: all 0.2s ease;
  background: white;
}

.input-icon-wrapper input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(0, 113, 227, 0.15);
}

.login-btn {
  background: var(--primary-color);
  color: white;
  border: none;
  padding: 0.75rem;
  border-radius: 12px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  margin-top: 0.5rem;
}

.login-btn:hover {
  background: #005BBF;
  transform: translateY(-2px);
  box-shadow: 0 6px 12px rgba(0, 113, 227, 0.2);
}

.login-btn:active {
  transform: translateY(0);
}

.login-footer {
  text-align: center;
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
}

.login-footer p {
  color: var(--text-color);
  font-weight: 500;
  margin-bottom: 0.25rem;
  font-size: 0.9rem;
}

.login-footer small {
  color: var(--light-text);
  font-size: 0.75rem;
}

/* Responsive para login */
@media (max-width: 480px) {
  .login-container {
    padding: 0.75rem;
  }
  
  .login-card {
    padding: 1.25rem;
  }
  
  .login-header h2 {
    font-size: 1.25rem;
  }
  
  .login-logo {
    height: 60px;
  }
  
  .input-icon-wrapper input {
    padding: 0.7rem 1rem 0.7rem 3rem;
    font-size: 0.9rem;
  }
  
  .login-btn {
    padding: 0.7rem;
    font-size: 0.9rem;
  }
}

/* Range Selection Section */
.range-selection {
  background: white;
  border-radius: 16px;
  padding: 1.5rem;
  margin-top: 1.5rem;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
}

.range-selection h3 {
  font-size: 1rem;
  margin-bottom: 0.75rem;
  color: var(--text-color);
}

.range-hint {
  color: var(--light-text);
  font-size: 0.9rem;
  margin-bottom: 1.25rem;
}

.range-inputs {
  display: flex;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.input-group {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.input-group label {
  font-size: 0.85rem;
  color: var(--text-color);
  font-weight: 500;
}

.input-group input {
  padding: 0.75rem;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  font-size: 0.9rem;
  transition: all 0.2s ease;
}

.input-group input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 2px rgba(0, 113, 227, 0.15);
}

.range-info {
  background-color: rgba(0, 113, 227, 0.05);
  border-left: 3px solid var(--primary-color);
  padding: 0.75rem 1rem;
  border-radius: 0 8px 8px 0;
}

.range-info p {
  font-size: 0.85rem;
  color: var(--light-text);
  margin: 0;
}

/* Media query para pantallas pequeñas */
@media (max-width: 640px) {
  .range-inputs {
    flex-direction: column;
    gap: 0.75rem;
  }
}

/* Toast Notifications */
.toast {
  position: fixed;
  bottom: 20px;
  right: 20px;
  min-width: 300px;
  max-width: 400px;
  background-color: white;
  color: var(--text-color);
  border-radius: 12px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.15);
  overflow: hidden;
  z-index: 1000;
  transform: translateY(100px);
  opacity: 0;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

.toast-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  background-color: #f8f8fa;
  border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

.toast-body {
  padding: 16px;
  line-height: 1.5;
}

.toast-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--light-text);
  transition: all 0.2s ease;
}

.toast-close:hover {
  color: var(--text-color);
}

.toast-info {
  border-left: 4px solid var(--primary-color);
}

.toast-success {
  border-left: 4px solid var(--success-color);
}

.toast-error {
  border-left: 4px solid var(--error-color);
}

.toast-warning {
  border-left: 4px solid #FFC107;
}