/* ===== CSS VARIABLES ===== */
:root {
  /* Primary Colors */
  --primary-color: #667eea;
  --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --secondary-color: #f093fb;
  --accent-color: #4facfe;
  
  /* Background Colors */
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #e2e8f0;
  --bg-glass: rgba(255, 255, 255, 0.25);
  --bg-modal: rgba(0, 0, 0, 0.5);
  
  /* Text Colors */
  --text-primary: #1a202c;
  --text-secondary: #4a5568;
  --text-muted: #718096;
  --text-white: #ffffff;
  
  /* Border Colors */
  --border-light: #e2e8f0;
  --border-medium: #cbd5e0;
  --border-dark: #a0aec0;
  
  /* Shadow Variables */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  --shadow-glass: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
  --shadow-neumorphism: 20px 20px 60px #bebebe, -20px -20px 60px #ffffff;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;
  
  /* Transitions */
  --transition-fast: 0.15s ease-in-out;
  --transition-normal: 0.3s ease-in-out;
  --transition-slow: 0.5s ease-in-out;
  
  /* Z-index */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal: 1040;
  --z-popover: 1050;
  --z-tooltip: 1060;
}

/* ===== DARK THEME VARIABLES ===== */
[data-theme="dark"] {
  --bg-primary: #1a202c;
  --bg-secondary: #2d3748;
  --bg-tertiary: #4a5568;
  --bg-glass: rgba(0, 0, 0, 0.25);
  
  --text-primary: #f7fafc;
  --text-secondary: #e2e8f0;
  --text-muted: #a0aec0;
  
  --border-light: #4a5568;
  --border-medium: #718096;
  --border-dark: #a0aec0;
  
  --shadow-neumorphism: 20px 20px 60px #0f1419, -20px -20px 60px #252f3f;
}

/* ===== RESET & BASE STYLES ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* ===== LOADING SCREEN ===== */
.loading-screen {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--primary-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-modal);
  transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

.loading-screen.hidden {
  opacity: 0;
  visibility: hidden;
}

.loading-animation {
  text-align: center;
  color: var(--text-white);
}

.loading-dots {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: center;
  margin-bottom: var(--spacing-lg);
}

.loading-dots span {
  width: 12px;
  height: 12px;
  background: var(--text-white);
  border-radius: var(--radius-full);
  animation: loading-bounce 1.4s ease-in-out infinite both;
}

.loading-dots span:nth-child(1) { animation-delay: -0.32s; }
.loading-dots span:nth-child(2) { animation-delay: -0.16s; }

@keyframes loading-bounce {
  0%, 80%, 100% {
    transform: scale(0);
  }
  40% {
    transform: scale(1);
  }
}

/* ===== APP CONTAINER ===== */
.app-container {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--bg-primary);
}

/* ===== HEADER ===== */
.app-header {
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-light);
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  box-shadow: var(--shadow-md);
}

.header-content {
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--spacing-md) var(--spacing-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-lg);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--primary-color);
}

.logo i {
  font-size: 1.5rem;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ===== PLATFORM NAVIGATION ===== */
.platform-nav {
  display: flex;
  gap: var(--spacing-xs);
  background: var(--bg-secondary);
  padding: var(--spacing-xs);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
}

.platform-btn {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-md);
  border: none;
  background: transparent;
  color: var(--text-secondary);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-size: 0.875rem;
  font-weight: 500;
  white-space: nowrap;
}

.platform-btn:hover {
  background: var(--bg-glass);
  color: var(--text-primary);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.platform-btn.active {
  background: var(--primary-gradient);
  color: var(--text-white);
  box-shadow: var(--shadow-lg);
}

.platform-btn i {
  font-size: 1rem;
}

.platform-btn span {
  display: none;
}

/* ===== HEADER CONTROLS ===== */
.header-controls {
  display: flex;
  gap: var(--spacing-sm);
}

.control-btn {
  width: 40px;
  height: 40px;
  border: none;
  background: var(--bg-secondary);
  color: var(--text-secondary);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-sm);
}

.control-btn:hover {
  background: var(--primary-color);
  color: var(--text-white);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* ===== MAIN CONTENT ===== */
.main-content {
  flex: 1;
  position: relative;
  overflow: hidden;
}

.screen {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
  transform: translateX(20px);
}

.screen.active {
  opacity: 1;
  visibility: visible;
  transform: translateX(0);
}

/* ===== HOME SCREEN ===== */
.home-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-2xl) var(--spacing-lg);
}

.hero-section {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
}

.hero-section h1 {
  font-size: 3rem;
  font-weight: 800;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--spacing-md);
  line-height: 1.2;
}

.hero-section p {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-2xl);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* ===== FEATURE GRID ===== */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-2xl);
}

.feature-card {
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  text-align: center;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-lg);
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-2xl);
  border-color: var(--primary-color);
}

.feature-card i {
  font-size: 2.5rem;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--spacing-md);
}

.feature-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

/* ===== PLATFORM GRID ===== */
.platform-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
}

.platform-card {
  background: var(--bg-secondary);
  border-radius: var(--radius-2xl);
  padding: var(--spacing-xl);
  text-align: center;
  transition: all var(--transition-normal);
  cursor: pointer;
  border: 2px solid transparent;
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}

.platform-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--primary-gradient);
  opacity: 0;
  transition: opacity var(--transition-normal);
  z-index: -1;
}

.platform-card:hover {
  transform: translateY(-10px) scale(1.02);
  box-shadow: var(--shadow-2xl);
  border-color: var(--primary-color);
}

.platform-card:hover::before {
  opacity: 0.1;
}

.platform-icon {
  width: 80px;
  height: 80px;
  border-radius: var(--radius-2xl);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--spacing-lg);
  font-size: 2.5rem;
  color: var(--text-white);
  box-shadow: var(--shadow-xl);
  position: relative;
  overflow: hidden;
}

.platform-icon::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: inherit;
  filter: blur(20px);
  opacity: 0.3;
  z-index: -1;
}

.platform-icon.tiktok { background: linear-gradient(135deg, #ff0050, #ff4081); }
.platform-icon.facebook { background: linear-gradient(135deg, #1877f2, #42a5f5); }
.platform-icon.instagram { background: linear-gradient(135deg, #e4405f, #f093fb); }
.platform-icon.telegram { background: linear-gradient(135deg, #0088cc, #29b6f6); }
.platform-icon.twitter { background: linear-gradient(135deg, #1da1f2, #64b5f6); }
.platform-icon.snapchat { background: linear-gradient(135deg, #fffc00, #fff176); color: #000; }

.platform-card h3 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.platform-card p {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
  font-size: 0.875rem;
}

.start-btn {
  background: var(--primary-gradient);
  color: var(--text-white);
  border: none;
  padding: var(--spacing-sm) var(--spacing-xl);
  border-radius: var(--radius-full);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-md);
  font-size: 0.875rem;
}

.start-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl);
}

/* ===== CHAT CONTAINER ===== */
.chat-container {
  height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--bg-primary);
  max-width: 800px;
  margin: 0 auto;
  box-shadow: var(--shadow-2xl);
  border-radius: var(--radius-2xl);
  overflow: hidden;
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

/* ===== CHAT HEADER ===== */
.chat-header {
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: var(--shadow-sm);
}

.user-info {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.avatar {
  position: relative;
  width: 50px;
  height: 50px;
}

.avatar img {
  width: 100%;
  height: 100%;
  border-radius: var(--radius-full);
  object-fit: cover;
  box-shadow: var(--shadow-md);
}

.status-indicator {
  position: absolute;
  bottom: 2px;
  right: 2px;
  width: 14px;
  height: 14px;
  border-radius: var(--radius-full);
  border: 2px solid var(--bg-primary);
  background: #10b981;
}

.status-indicator.offline {
  background: #6b7280;
}

.user-details h3 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 2px;
}

.user-details p {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.chat-actions {
  display: flex;
  gap: var(--spacing-sm);
}

.action-btn {
  width: 40px;
  height: 40px;
  border: none;
  background: var(--bg-secondary);
  color: var(--text-secondary);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-sm);
}

.action-btn:hover {
  background: var(--primary-color);
  color: var(--text-white);
  transform: scale(1.1);
  box-shadow: var(--shadow-md);
}

/* ===== CHAT MESSAGES ===== */
.chat-messages {
  flex: 1;
  padding: var(--spacing-lg);
  overflow-y: auto;
  background: var(--bg-secondary);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.chat-messages::-webkit-scrollbar {
  width: 6px;
}

.chat-messages::-webkit-scrollbar-track {
  background: var(--bg-tertiary);
  border-radius: var(--radius-full);
}

.chat-messages::-webkit-scrollbar-thumb {
  background: var(--border-medium);
  border-radius: var(--radius-full);
}

.chat-messages::-webkit-scrollbar-thumb:hover {
  background: var(--border-dark);
}

/* ===== MESSAGE STYLES ===== */
.message {
  display: flex;
  align-items: flex-end;
  gap: var(--spacing-sm);
  animation: messageSlideIn 0.3s ease-out;
}

.message.sent {
  flex-direction: row-reverse;
}

.message-avatar {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  object-fit: cover;
  box-shadow: var(--shadow-sm);
}

.message-content {
  max-width: 70%;
  position: relative;
}

.message-bubble {
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-lg);
  font-size: 0.875rem;
  line-height: 1.4;
  box-shadow: var(--shadow-sm);
  position: relative;
  word-wrap: break-word;
}

.message.received .message-bubble {
  background: var(--bg-primary);
  color: var(--text-primary);
  border-bottom-left-radius: var(--spacing-xs);
}

.message.sent .message-bubble {
  background: var(--primary-gradient);
  color: var(--text-white);
  border-bottom-right-radius: var(--spacing-xs);
}

.message-time {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: var(--spacing-xs);
  text-align: right;
}

.message.received .message-time {
  text-align: left;
}

.message-status {
  display: flex;
  align-items: center;
  gap: 2px;
  margin-top: var(--spacing-xs);
  justify-content: flex-end;
}

.message-status i {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.message-status.read i {
  color: var(--primary-color);
}

@keyframes messageSlideIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===== TYPING INDICATOR ===== */
.typing-indicator {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--bg-glass);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-top: 1px solid var(--border-light);
  animation: fadeIn 0.3s ease-out;
}

.typing-indicator span {
  width: 8px;
  height: 8px;
  background: var(--text-muted);
  border-radius: var(--radius-full);
  animation: typing-bounce 1.4s ease-in-out infinite both;
}

.typing-indicator span:nth-child(1) { animation-delay: -0.32s; }
.typing-indicator span:nth-child(2) { animation-delay: -0.16s; }

.typing-indicator p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  font-style: italic;
}

@keyframes typing-bounce {
  0%, 80%, 100% {
    transform: scale(0.8);
    opacity: 0.5;
  }
  40% {
    transform: scale(1);
    opacity: 1;
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* ===== CHAT INPUT AREA ===== */
.chat-input-area {
  background: var(--bg-primary);
  border-top: 1px solid var(--border-light);
}

.input-container {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-lg);
}

.input-btn {
  width: 40px;
  height: 40px;
  border: none;
  background: var(--bg-secondary);
  color: var(--text-secondary);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-sm);
}

.input-btn:hover {
  background: var(--primary-color);
  color: var(--text-white);
  transform: scale(1.1);
  box-shadow: var(--shadow-md);
}

.message-input {
  flex: 1;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 2px solid var(--border-light);
  border-radius: var(--radius-full);
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-size: 0.875rem;
  outline: none;
  transition: all var(--transition-fast);
}

.message-input:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
  background: var(--bg-primary);
}

.send-btn {
  width: 40px;
  height: 40px;
  border: none;
  background: var(--primary-gradient);
  color: var(--text-white);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
}

.send-btn:hover {
  transform: scale(1.1);
  box-shadow: var(--shadow-lg);
}

.send-btn:active {
  transform: scale(0.95);
}

/* ===== MODAL STYLES ===== */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--bg-modal);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-modal);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.modal.active {
  opacity: 1;
  visibility: visible;
}

.modal-content {
  background: var(--bg-primary);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-2xl);
  max-width: 500px;
  width: 90%;
  max-height: 80vh;
  overflow-y: auto;
  transform: scale(0.9);
  transition: transform var(--transition-normal);
}

.modal.active .modal-content {
  transform: scale(1);
}

.modal-header {
  padding: var(--spacing-xl);
  border-bottom: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-header h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

.close-btn {
  width: 32px;
  height: 32px;
  border: none;
  background: var(--bg-secondary);
  color: var(--text-secondary);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
}

.close-btn:hover {
  background: #ef4444;
  color: var(--text-white);
  transform: scale(1.1);
}

.modal-body {
  padding: var(--spacing-xl);
}

/* ===== SETTINGS STYLES ===== */
.setting-group {
  margin-bottom: var(--spacing-xl);
}

.setting-group h3 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
}

.theme-options {
  display: flex;
  gap: var(--spacing-sm);
}

.theme-btn {
  padding: var(--spacing-sm) var(--spacing-md);
  border: 2px solid var(--border-light);
  background: var(--bg-secondary);
  color: var(--text-secondary);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-size: 0.875rem;
  font-weight: 500;
}

.theme-btn:hover {
  border-color: var(--primary-color);
  color: var(--text-primary);
}

.theme-btn.active {
  background: var(--primary-gradient);
  border-color: var(--primary-color);
  color: var(--text-white);
}

.setting-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md) 0;
  border-bottom: 1px solid var(--border-light);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.setting-item:hover {
  background: var(--bg-secondary);
  margin: 0 calc(-1 * var(--spacing-md));
  padding-left: var(--spacing-md);
  padding-right: var(--spacing-md);
  border-radius: var(--radius-md);
}

.setting-item input[type="checkbox"] {
  width: 20px;
  height: 20px;
  accent-color: var(--primary-color);
  cursor: pointer;
}

.setting-item select {
  padding: var(--spacing-xs) var(--spacing-sm);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  background: var(--bg-secondary);
  color: var(--text-primary);
  cursor: pointer;
}

/* ===== EXPORT STYLES ===== */
.export-options {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.export-btn {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-lg);
  border: 2px solid var(--border-light);
  background: var(--bg-secondary);
  color: var(--text-primary);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-size: 1rem;
  font-weight: 500;
}

.export-btn:hover {
  border-color: var(--primary-color);
  background: var(--primary-color);
  color: var(--text-white);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.export-btn i {
  font-size: 1.25rem;
}

/* ===== RESPONSIVE DESIGN ===== */
@media (min-width: 768px) {
  .platform-btn span {
    display: inline;
  }
  
  .hero-section h1 {
    font-size: 4rem;
  }
  
  .chat-container {
    margin-top: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
  }
}

@media (max-width: 767px) {
  .header-content {
    padding: var(--spacing-sm) var(--spacing-md);
    gap: var(--spacing-sm);
  }
  
  .platform-nav {
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
  }
  
  .platform-nav::-webkit-scrollbar {
    display: none;
  }
  
  .hero-section h1 {
    font-size: 2rem;
  }
  
  .hero-section p {
    font-size: 1rem;
  }
  
  .home-container {
    padding: var(--spacing-lg) var(--spacing-md);
  }
  
  .feature-grid {
    grid-template-columns: 1fr;
  }
  
  .platform-grid {
    grid-template-columns: 1fr;
  }
  
  .chat-container {
    margin: 0;
    border-radius: 0;
    height: 100vh;
  }
  
  .modal-content {
    width: 95%;
    margin: var(--spacing-md);
  }
}

@media (max-width: 480px) {
  .logo span {
    display: none;
  }
  
  .header-controls {
    gap: var(--spacing-xs);
  }
  
  .control-btn {
    width: 36px;
    height: 36px;
  }
  
  .platform-card {
    padding: var(--spacing-lg);
  }
  
  .platform-icon {
    width: 60px;
    height: 60px;
    font-size: 2rem;
  }
  
  .chat-header {
    padding: var(--spacing-md);
  }
  
  .input-container {
    padding: var(--spacing-md);
  }
}