/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --body-color: #d6d6d6;
  --primary-color: #00897b;
  --primary-dark: #00695c;
  --secondary-color: #ff6f00;
  --background-color: #f5f5f5;
  --card-background: #ffffff;
  --text-primary: #212121;
  --text-secondary: #757575;
  --border-color: #e0e0e0;
  --message-own: #dcf8c6;
  --message-other: #ffffff;
  --error-color: #d32f2f;
  --success-color: #388e3c;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  --shadow-hover: 0 4px 12px rgba(0, 0, 0, 0.15);
}

body {
  font-family: "Poppins", -apple-system, BlinkMacSystemFont, "Segoe UI",
    "Roboto", "Oxygen", "Ubuntu", "Cantarell", "Fira Sans", "Droid Sans",
    "Helvetica Neue", sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background-color: var(--body-color);
  color: var(--text-primary);
  overflow: hidden;
}

/* Screen Management */
.screen {
  display: none;
  min-height: 100vh;
}

.screen.active {
  display: flex;
}

/* Welcome Screen */
#welcome-screen {
  justify-content: center;
  align-items: center;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  padding: 20px;
}

.welcome-container {
  background: var(--card-background);
  border-radius: 16px;
  padding: 40px;
  max-width: 450px;
  width: 100%;
  box-shadow: var(--shadow-hover);
  animation: slideIn 0.5s ease-out;
}

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

.logo-container {
  text-align: center;
  margin-bottom: 30px;
}

.logo-container h1 {
  font-size: 2.5rem;
  color: var(--primary-color);
  margin-bottom: 10px;
}

.tagline {
  color: var(--text-secondary);
  font-size: 1rem;
  margin-bottom: 0;
}

.age-restriction {
  color: var(--error-color);
  font-weight: 600;
  font-size: 0.9rem;
  margin-top: 8px;
  padding: 8px 12px;
  background-color: rgba(211, 47, 47, 0.1);
  border-radius: 6px;
  display: inline-block;
}

.welcome-form h2 {
  font-size: 1.5rem;
  margin-bottom: 20px;
  color: var(--text-primary);
  text-align: center;
}

.welcome-form input[type="text"],
.welcome-form input[type="number"],
.welcome-form select {
  width: 100%;
  padding: 14px;
  margin-bottom: 16px;
  border: 2px solid var(--border-color);
  border-radius: 8px;
  font-size: 1rem;
  transition: border-color 0.3s;
  background-color: white;
}

.welcome-form input:focus,
.welcome-form select:focus {
  outline: none;
  border-color: var(--primary-color);
}

.gender-select {
  display: flex;
  gap: 12px;
  margin-bottom: 24px;
}

.gender-option {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 12px;
  border: 2px solid var(--border-color);
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.3s;
}

.gender-option:hover {
  border-color: var(--primary-color);
  background-color: rgba(0, 137, 123, 0.05);
}

.gender-option input[type="radio"] {
  display: none;
}

.gender-option input[type="radio"]:checked + span {
  color: var(--primary-color);
  font-weight: 600;
}

.gender-option input[type="radio"]:checked ~ span {
  color: var(--primary-color);
}

.gender-option:has(input[type="radio"]:checked) {
  border-color: var(--primary-color);
  background-color: rgba(0, 137, 123, 0.1);
}

.btn-primary {
  width: 100%;
  padding: 14px;
  background-color: var(--primary-color);
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.3s;
}

.btn-primary:hover {
  background-color: var(--primary-dark);
}

.legal-links {
  margin-top: 20px;
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.link-btn {
  background: none;
  border: none;
  color: var(--primary-color);
  cursor: pointer;
  text-decoration: underline;
  font-size: 0.9rem;
  padding: 0;
  margin: 0 5px;
}

.link-btn:hover {
  color: var(--primary-dark);
}

.features {
  display: flex;
  justify-content: space-around;
  margin-top: 30px;
  padding-top: 30px;
  border-top: 1px solid var(--border-color);
}

.feature {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.feature-icon {
  font-size: 1.5rem;
}

/* Chat Screen */
#chat-screen {
  flex-direction: column;
  height: 100vh;
}

.chat-header {
  background-color: var(--primary-color);
  color: white;
  padding: 16px 12px;
  box-shadow: var(--shadow);
  z-index: 10;
  height: 72px;
  display: flex;
  align-items: center;
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1400px;
  margin: 0 auto;
  width: 100%;
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: white;
  cursor: pointer;
  padding: 8px;
  margin-right: 12px;
  position: relative;
  transition: transform 0.2s;
}

.mobile-menu-btn:hover {
  transform: scale(1.1);
}

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

.mobile-unread-badge {
  position: absolute;
  top: 2px;
  right: 2px;
  background-color: var(--secondary-color);
  color: white;
  font-size: 0.7rem;
  font-weight: bold;
  padding: 2px 6px;
  border-radius: 10px;
  min-width: 18px;
  text-align: center;
}

.mobile-unread-badge.hidden {
  display: none;
}

.app-title {
  font-size: 1.5rem;
  font-weight: 600;
}

.user-info {
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(255, 255, 255, 0.15);
  padding: 8px 16px;
  border-radius: 20px;
}

.user-avatar-small {
  font-size: 1.2rem;
}

.chat-container {
  display: flex;
  flex: 1;
  overflow: hidden;
  max-width: 1400px;
  margin: 0 auto;
  width: 100%;
}

/* User Sidebar */
.user-sidebar {
  width: 320px;
  background-color: var(--card-background);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.sidebar-header {
  padding: 16px;
  background-color: var(--background-color);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.sidebar-header h3 {
  font-size: 1.1rem;
  color: var(--text-primary);
}

.online-badge {
  background-color: var(--success-color);
  color: white;
  padding: 4px 10px;
  border-radius: 12px;
  font-size: 0.85rem;
  font-weight: 600;
}

.user-list {
  flex: 1;
  overflow-y: auto;
  padding: 8px;
}

.no-users {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-secondary);
}

.user-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  border-radius: 8px;
  cursor: pointer;
  transition: background-color 0.2s;
  margin-bottom: 4px;
  position: relative;
}

.user-item:hover {
  background-color: var(--background-color);
}

.user-item.active {
  background-color: rgba(0, 137, 123, 0.1);
  border-left: 3px solid var(--primary-color);
}

.user-avatar {
  font-size: 2rem;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--background-color);
  border-radius: 50%;
}

.user-details {
  flex: 1;
  min-width: 0;
}

.user-name-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 4px;
}

.user-name {
  font-weight: 600;
  color: var(--text-primary);
  font-size: 0.95rem;
}

.user-age {
  color: var(--text-secondary);
  font-size: 0.85rem;
}

.last-message {
  font-size: 0.85rem;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.unread-badge {
  position: absolute;
  right: 12px;
  top: 65%;
  transform: translateY(-50%);
  background-color: var(--secondary-color);
  color: white;
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 0.75rem;
  font-weight: 600;
}

/* Chat Main Area */
.chat-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  background-color: var(--background-color);
  overflow: hidden;
}

.chat-welcome {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
}

.chat-welcome.hidden {
  display: none;
}

.chat-welcome-content {
  text-align: center;
  padding: 40px;
}

.chat-welcome-content h2 {
  font-size: 2rem;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.chat-welcome-content p {
  color: var(--text-secondary);
  font-size: 1.1rem;
}

#chat-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

#chat-area.hidden {
  display: none;
}

.messages-container {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* Messages */
.message {
  display: flex;
  margin-bottom: 8px;
  animation: messageSlide 0.3s ease-out;
}

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

.message.own {
  justify-content: flex-end;
}

.message.other {
  justify-content: flex-start;
}

.message-content {
  max-width: 60%;
  padding: 10px 14px;
  border-radius: 12px;
  position: relative;
}

.message.own .message-content {
  background-color: var(--message-own);
  border-bottom-right-radius: 4px;
}

.message.other .message-content {
  background-color: var(--message-other);
  border-bottom-left-radius: 4px;
  box-shadow: var(--shadow);
}

.message-sender {
  font-size: 0.75rem;
  color: var(--primary-color);
  font-weight: 600;
  margin-bottom: 4px;
}

.message-text {
  word-wrap: break-word;
  color: var(--text-primary);
  font-size: 0.95rem;
  line-height: 1.4;
}

.message-time {
  font-size: 0.7rem;
  color: var(--text-secondary);
  margin-top: 4px;
  text-align: right;
}

/* Chat Input */
.chat-input-container {
  background-color: var(--card-background);
  padding: 16px;
  border-top: 1px solid var(--border-color);
}

.typing-indicator {
  display: none;
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-style: italic;
  padding: 4px 8px;
  margin-bottom: 8px;
}

.input-wrapper {
  display: flex;
  gap: 8px;
  align-items: center;
}

#message-input {
  flex: 1;
  padding: 12px 16px;
  border: 2px solid var(--border-color);
  border-radius: 24px;
  font-size: 0.95rem;
  transition: border-color 0.3s;
}

#message-input:focus {
  outline: none;
  border-color: var(--primary-color);
}

.btn-report {
  padding: 10px 16px;
  background-color: var(--error-color);
  color: white;
  border: none;
  border-radius: 20px;
  cursor: pointer;
  font-size: 1rem;
  transition: background-color 0.3s;
}

.btn-report:hover {
  background-color: #b71c1c;
}

.btn-send {
  padding: 10px 24px;
  background-color: var(--primary-color);
  color: white;
  border: none;
  border-radius: 20px;
  cursor: pointer;
  font-size: 0.95rem;
  font-weight: 600;
  transition: background-color 0.3s;
}

.btn-send:hover {
  background-color: var(--primary-dark);
}

/* Modal Styles */
.modal {
  display: none;
  position: fixed;
  z-index: 1000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  animation: fadeIn 0.3s;
  align-items: center;
  justify-content: center;
}

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

.modal-content {
  background-color: var(--card-background);
  margin: 0;
  padding: 0;
  border-radius: 12px;
  width: 90%;
  max-width: 700px;
  max-height: 80vh;
  overflow: hidden;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
  animation: slideDown 0.3s ease-out;
}

@keyframes slideDown {
  from {
    transform: translateY(-50px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

.modal-content h2 {
  background-color: var(--primary-color);
  color: white;
  padding: 20px 24px;
  margin: 0;
  position: sticky;
  top: 0;
  z-index: 1;
}

.modal-body {
  padding: 24px;
  overflow-y: auto;
  max-height: calc(80vh - 80px);
}

.modal-body h3 {
  color: var(--primary-color);
  margin-top: 20px;
  margin-bottom: 10px;
  font-size: 1.1rem;
}

.modal-body p,
.modal-body ul {
  margin-bottom: 12px;
  line-height: 1.6;
  color: var(--text-primary);
}

.modal-body ul {
  padding-left: 24px;
}

.modal-body li {
  margin-bottom: 8px;
}

.close {
  color: white;
  float: right;
  font-size: 32px;
  font-weight: bold;
  line-height: 20px;
  cursor: pointer;
  transition: transform 0.2s;
}

.close:hover,
.close:focus {
  transform: scale(1.2);
}

.modal-actions {
  display: flex;
  gap: 12px;
  padding: 20px 24px;
  background-color: var(--background-color);
  border-top: 1px solid var(--border-color);
  justify-content: flex-end;
}

.btn-cancel,
.btn-confirm {
  padding: 10px 24px;
  border: none;
  border-radius: 6px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.2s;
}

.btn-cancel {
  background-color: var(--border-color);
  color: var(--text-primary);
}

.btn-cancel:hover {
  background-color: #d0d0d0;
}

.btn-confirm {
  background-color: var(--error-color);
  color: white;
}

.btn-confirm:hover {
  background-color: #b71c1c;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--background-color);
}

::-webkit-scrollbar-thumb {
  background: var(--text-secondary);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-primary);
}

/* Responsive Design */
@media (max-width: 768px) {
  .mobile-menu-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(255, 255, 255, 0.15);
    border-radius: 8px;
    padding: 10px 12px;
    margin-right: 8px;
    transition: background-color 0.2s, transform 0.2s;
  }

  .mobile-menu-btn:hover {
    background-color: rgba(255, 255, 255, 0.25);
    transform: scale(1.05);
  }

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

  .chat-container {
    position: relative;
  }

  .user-sidebar {
    position: fixed;
    left: -100%;
    top: 72px;
    width: 280px;
    height: calc(100vh - 72px);
    z-index: 100;
    border-right: 1px solid var(--border-color);
    transition: left 0.3s ease-in-out;
    box-shadow: 2px 0 8px rgba(0, 0, 0, 0.15);
  }

  .user-sidebar.mobile-active {
    left: 0;
  }

  .chat-main {
    width: 100%;
  }

  .welcome-container {
    padding: 30px 20px;
    max-height: 90vh;
    overflow-y: auto;
  }

  .logo-container h1 {
    font-size: 2rem;
  }

  .message-content {
    max-width: 85%;
  }

  .header-content {
    padding: 0 4px;
  }

  .app-title {
    font-size: 1.2rem;
  }

  .user-info {
    font-size: 0.85rem;
    padding: 6px 12px;
  }
}

@media (max-width: 480px) {
  .welcome-container {
    padding: 20px 16px;
  }

  .logo-container h1 {
    font-size: 1.75rem;
  }

  .gender-select {
    flex-direction: column;
  }

  .modal-content {
    width: 95%;
    margin: 10% auto;
  }

  .features {
    flex-direction: row;
    gap: 16px;
  }
}

/* Utility Classes */
.hidden {
  display: none !important;
}