:root {
  --whatsapp-green: #25D366;
  --whatsapp-dark-green: #128C7E;
  --whatsapp-light-green: #DCF8C6;
  --whatsapp-background: #E5DDD5;
  --whatsapp-chat-bg: #ECE5DD;
  --accent-color: #34B7F1;
  --text-color: #4A4A4A;
  --text-light: #6A6A6A;
  --border-color: #E0E0E0;
  --input-bg: #F8F9FA;
  --main-bg: #F0F2F5;
  --shadow: 0 2px 10px rgba(0,0,0,0.1);
  --panel-radius: 12px;
  --button-radius: 8px;
  --transition: all 0.3s ease;
}

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

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  color: var(--text-color);
  background-color: var(--main-bg);
  line-height: 1.5;
  min-height: 100vh;
}

.app-container {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  max-width: 1600px;
  margin: 0 auto;
  padding: 0 15px;
}

.app-header {
  text-align: center;
  padding: 20px 0;
  margin-bottom: 20px;
}

.logo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.logo i {
  color: var(--whatsapp-green);
  font-size: 2.5rem;
}

.logo h1 {
  font-size: 2rem;
  font-weight: 600;
  color: var(--text-color);
  margin: 0;
}

.app-subtitle {
  color: var(--text-light);
  margin-top: 5px;
}

.main-content {
  display: flex;
  flex-direction: row;
  gap: 20px;
  flex: 1;
  margin-bottom: 30px;
}

@media (max-width: 992px) {
  .main-content {
    flex-direction: column;
  }
}

.editor-container {
  flex: 1;
  display: flex;
  flex-direction: column;
  background-color: #fff;
  border-radius: var(--panel-radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  padding: 10px;
  background-color: #f8f8f8;
  border-bottom: 1px solid var(--border-color);
  gap: 10px;
}

.toolbar-group {
  display: flex;
  gap: 5px;
  padding: 0 5px;
}

.toolbar-group:not(:last-child) {
  border-right: 1px solid var(--border-color);
}

.toolbar-btn {
  background: none;
  border: none;
  border-radius: var(--button-radius);
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
  color: var(--text-color);
}

.toolbar-btn:hover {
  background-color: rgba(0, 0, 0, 0.05);
}

.toolbar-btn:active {
  background-color: rgba(0, 0, 0, 0.1);
}

.toolbar-btn[data-tooltip]:hover::after {
  content: attr(data-tooltip);
  position: absolute;
  top: -30px;
  left: 50%;
  transform: translateX(-50%);
  background-color: rgba(0, 0, 0, 0.8);
  color: #fff;
  border-radius: 4px;
  padding: 3px 8px;
  font-size: 12px;
  white-space: nowrap;
  z-index: 100;
}

.editor-wrapper {
  position: relative;
  flex: 1;
}

.editor {
  border: none;
  min-height: 250px;
  padding: 15px;
  outline: none;
  width: 100%;
  height: 100%;
  background-color: var(--input-bg);
  font-size: 1rem;
  color: var(--text-color);
  overflow-y: auto;
}

.editor:focus {
  outline: none;
}

.emoji-panel {
  display: none;
  position: absolute;
  bottom: 10px;
  left: 10px;
  background-color: white;
  border-radius: var(--panel-radius);
  box-shadow: var(--shadow);
  z-index: 10;
  width: 320px;
  max-height: 320px;
}

.emoji-categories {
  display: flex;
  border-bottom: 1px solid var(--border-color);
  padding: 5px;
}

.emoji-category {
  background: none;
  border: none;
  padding: 8px;
  cursor: pointer;
  border-radius: var(--button-radius);
  transition: var(--transition);
}

.emoji-category:hover, .emoji-category.active {
  background-color: rgba(0, 0, 0, 0.05);
}

.emoji-category-content {
  padding: 10px;
  display: none;
  max-height: 250px;
  overflow-y: auto;
  grid-template-columns: repeat(6, 1fr);
  gap: 5px;
}

.emoji-category-content.active {
  display: grid;
}

.emoji-btn {
  background: none;
  border: none;
  font-size: 1.5rem;
  padding: 8px;
  cursor: pointer;
  border-radius: var(--button-radius);
  transition: var(--transition);
}

.emoji-btn:hover {
  background-color: rgba(0, 0, 0, 0.05);
}

.actions {
  display: flex;
  padding: 10px;
  gap: 10px;
  background-color: #f8f8f8;
  border-top: 1px solid var(--border-color);
  justify-content: flex-end;
}

.actions .btn i {
  margin-right: 5px;
}

.preview-container {
  flex: 1;
  border-radius: var(--panel-radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  max-width: 500px;
}

.preview-header {
  background-color: var(--whatsapp-dark-green);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 15px;
  color: white;
}

.contact-info {
  display: flex;
  align-items: center;
}

.contact-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: #ccc;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: 10px;
}

.contact-name {
  font-weight: 600;
  font-size: 1rem;
}

.preview-actions i {
  cursor: pointer;
}

.chat-background {
  background-image: url("data:image/svg+xml,%3Csvg width='100' height='100' viewBox='0 0 100 100' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M11 18c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm48 25c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm-43-7c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm63 31c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM34 90c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm56-76c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM12 86c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm28-65c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm23-11c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-6 60c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm29 22c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zM32 63c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm57-13c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-9-21c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM60 91c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM35 41c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM12 60c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2z' fill='%23e5e5f7' fill-opacity='0.2' fill-rule='evenodd'/%3E%3C/svg%3E"),
    linear-gradient(to bottom, var(--whatsapp-background), var(--whatsapp-background));
  flex: 1;
  padding: 20px;
  overflow-y: auto;
}

.message-container {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 10px;
}

.message {
  background-color: var(--whatsapp-light-green);
  border-radius: 12px 0 12px 12px;
  padding: 8px 10px;
  position: relative;
  max-width: 85%;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.message p {
  margin: 0;
  padding-right: 50px;
  word-wrap: break-word;
}

.message-time {
  position: absolute;
  bottom: 5px;
  right: 25px;
  font-size: 0.7rem;
  color: var(--text-light);
}

.message-status {
  position: absolute;
  bottom: 5px;
  right: 8px;
  font-size: 0.7rem;
  color: var(--whatsapp-green);
}

.app-footer {
  text-align: center;
  padding: 15px 0;
  color: var(--text-light);
  font-size: 0.9rem;
  background-color: #fff;
  border-top: 1px solid var(--border-color);
  margin-top: auto;
}

/* Link Modal */
.overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0,0,0,0.5);
  display: none;
  z-index: 1000;
  align-items: center;
  justify-content: center;
}

.overlay.active {
  display: flex;
}

/* Toast */
.toast-container {
  z-index: 1100;
}

/* WhatsApp message formatting */
#whatsappText b {
  font-weight: bold;
}

#whatsappText i {
  font-style: italic;
}

#whatsappText u {
  text-decoration: underline;
}

#whatsappText s {
  text-decoration: line-through;
}

#whatsappText a {
  color: var(--accent-color);
  text-decoration: none;
}

#whatsappText ul, #whatsappText ol {
  padding-left: 20px;
  margin: 5px 0;
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .logo h1 {
    font-size: 1.5rem;
  }
  
  .toolbar {
    flex-wrap: wrap;
  }
  
  .editor {
    min-height: 150px;
  }
  
  .actions {
    flex-wrap: wrap;
  }
  
  .actions .btn {
    flex: 1;
    font-size: 0.9rem;
    padding: 8px;
  }
  
  .preview-container {
    max-width: none;
  }
}