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

:root {
  --bg: #111b21;
  --bg-secondary: #1f2c33;
  --bg-hover: #2a3942;
  --bg-chat: #0b141a;
  --border: #2a3942;
  --text: #e9edef;
  --text-secondary: #8696a0;
  --green: #00a884;
  --green-dark: #005c4b;
  --green-light: #025144;
  --blue: #53bdeb;
  --orange: #f59e0b;
  --incoming: #1f2c33;
  --outgoing: #005c4b;
  --danger: #ef4444;
  --radius: 8px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  height: 100vh;
  overflow: hidden;
}

/* === LOGIN === */
#login-page {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
  background: linear-gradient(135deg, var(--bg) 0%, var(--bg-secondary) 100%);
}

.login-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 40px;
  width: 380px;
}

.login-card h1 {
  font-size: 22px;
  margin-bottom: 8px;
  color: var(--green);
}

.login-card p {
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 24px;
}

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.form-group input {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 14px;
  outline: none;
}

.form-group input:focus {
  border-color: var(--green);
}

.btn {
  padding: 10px 20px;
  border: none;
  border-radius: var(--radius);
  font-size: 14px;
  cursor: pointer;
  font-weight: 500;
  transition: opacity 0.2s;
}

.btn:hover { opacity: 0.9; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.btn-primary {
  background: var(--green);
  color: #fff;
  width: 100%;
}

.btn-sm {
  padding: 6px 12px;
  font-size: 12px;
}

.login-error {
  color: var(--danger);
  font-size: 13px;
  margin-top: 12px;
  display: none;
}

/* === DASHBOARD === */
#dashboard {
  display: none;
  height: 100vh;
  flex-direction: column;
}

/* Stats Bar */
.stats-bar {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 10px 20px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  min-height: 52px;
}

.stats-bar .logo {
  font-weight: 700;
  font-size: 15px;
  color: var(--green);
  margin-right: auto;
  white-space: nowrap;
}

.stat-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-secondary);
  white-space: nowrap;
}

.stat-item .stat-value {
  font-weight: 600;
  color: var(--text);
}

.stat-item.highlight .stat-value {
  color: var(--orange);
}

.btn-logout {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  padding: 6px 14px;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 12px;
}

.btn-logout:hover {
  border-color: var(--danger);
  color: var(--danger);
}

/* Main layout */
.main-layout {
  display: flex;
  flex: 1;
  overflow: hidden;
}

/* === LEFT SIDEBAR === */
.sidebar {
  width: 360px;
  min-width: 360px;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
}

.sidebar-header {
  padding: 12px;
  border-bottom: 1px solid var(--border);
}

.search-box {
  width: 100%;
  padding: 8px 14px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 13px;
  outline: none;
}

.search-box:focus { border-color: var(--green); }

.filter-tabs {
  display: flex;
  padding: 8px 12px;
  gap: 4px;
  border-bottom: 1px solid var(--border);
}

.filter-tab {
  padding: 5px 12px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-size: 12px;
  border-radius: 20px;
  cursor: pointer;
  white-space: nowrap;
}

.filter-tab.active {
  background: var(--green-dark);
  color: var(--green);
}

.filter-tab:hover:not(.active) {
  background: var(--bg-hover);
}

.conversation-list {
  flex: 1;
  overflow-y: auto;
}

.conv-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  cursor: pointer;
  border-bottom: 1px solid var(--border);
}

.conv-item:hover { background: var(--bg-hover); }
.conv-item.active { background: var(--bg-hover); }

.conv-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--bg-hover);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}

.conv-avatar.ad { background: var(--orange); color: #000; font-size: 14px; }

.conv-info {
  flex: 1;
  min-width: 0;
}

.conv-name {
  font-size: 14px;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.conv-preview {
  font-size: 12px;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-top: 2px;
}

.conv-meta {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 4px;
  flex-shrink: 0;
}

.conv-time {
  font-size: 11px;
  color: var(--text-secondary);
}

.conv-badge {
  background: var(--green);
  color: #fff;
  font-size: 11px;
  font-weight: 600;
  border-radius: 50%;
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.source-tag {
  display: inline-block;
  font-size: 10px;
  padding: 1px 6px;
  border-radius: 10px;
  font-weight: 600;
}

.source-tag.ad { background: var(--orange); color: #000; }
.source-tag.organic { background: var(--border); color: var(--text-secondary); }

/* === RIGHT PANEL === */
.chat-panel {
  flex: 1;
  display: flex;
  flex-direction: column;
  background: var(--bg-chat);
}

.chat-empty {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  font-size: 14px;
}

.chat-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 20px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
}

.chat-header-info {
  flex: 1;
}

.chat-header-name {
  font-size: 15px;
  font-weight: 500;
}

.chat-header-phone {
  font-size: 12px;
  color: var(--text-secondary);
}

.chat-header-actions {
  display: flex;
  gap: 8px;
}

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 16px 60px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.message-bubble {
  max-width: 65%;
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 14px;
  line-height: 1.4;
  position: relative;
  word-wrap: break-word;
}

.message-bubble.incoming {
  background: var(--incoming);
  align-self: flex-start;
  border-top-left-radius: 0;
}

.message-bubble.outgoing {
  background: var(--outgoing);
  align-self: flex-end;
  border-top-right-radius: 0;
}

.message-time {
  font-size: 10px;
  color: var(--text-secondary);
  margin-top: 4px;
  text-align: right;
}

.message-status {
  font-size: 10px;
  margin-left: 4px;
}

.message-status.delivered { color: var(--text-secondary); }
.message-status.read { color: var(--blue); }
.message-status.failed { color: var(--danger); }

/* Chat error banner */
.chat-error-banner {
  background: rgba(239, 68, 68, 0.15);
  border: 1px solid rgba(239, 68, 68, 0.3);
  border-radius: var(--radius);
  padding: 10px 14px;
  margin: 8px 0;
  font-size: 12px;
  color: #fca5a5;
  text-align: center;
  align-self: center;
}

.chat-error-banner strong {
  color: var(--danger);
}

.chat-progress-banner {
  background: rgba(37, 211, 102, 0.12);
  border: 1px solid rgba(37, 211, 102, 0.25);
  border-radius: var(--radius);
  padding: 10px 14px;
  margin: 8px 0;
  font-size: 12px;
  color: var(--green);
  text-align: center;
  align-self: center;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.progress-spinner {
  display: inline-block;
  width: 14px;
  height: 14px;
  border: 2px solid rgba(37, 211, 102, 0.3);
  border-top-color: var(--green);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Chat input */
.chat-input-area {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 20px;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
}

.chat-input {
  flex: 1;
  padding: 10px 16px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 24px;
  color: var(--text);
  font-size: 14px;
  outline: none;
  resize: none;
  max-height: 120px;
  line-height: 1.4;
}

.chat-input:focus { border-color: var(--green); }

.btn-send {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--green);
  border: none;
  color: #fff;
  font-size: 18px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.btn-send:hover { opacity: 0.9; }
.btn-send:disabled { opacity: 0.4; cursor: not-allowed; }

/* Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-secondary); }

/* Referral info banner */
.referral-banner {
  background: var(--green-light);
  border: 1px solid var(--green-dark);
  border-radius: var(--radius);
  padding: 10px 14px;
  margin: 8px 60px;
  font-size: 12px;
  color: var(--text-secondary);
}

.referral-banner strong { color: var(--orange); }

/* Loading spinner */
.spinner {
  width: 24px;
  height: 24px;
  border: 3px solid var(--border);
  border-top-color: var(--green);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 20px auto;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* New message compose */
.new-msg-form {
  display: flex;
  gap: 8px;
  padding: 12px 20px;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  align-items: center;
}

.new-msg-form input {
  flex: 1;
  padding: 8px 14px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 13px;
  outline: none;
}

.new-msg-form input:focus { border-color: var(--green); }

/* === SETTINGS BUTTON === */
.btn-settings {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  padding: 6px 10px;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 16px;
  line-height: 1;
}

.btn-settings:hover {
  border-color: var(--green);
  color: var(--green);
}

/* === MODAL === */
.modal-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 12px;
  width: 480px;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}

.modal-header h2 {
  font-size: 16px;
  font-weight: 600;
}

.modal-close {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 22px;
  cursor: pointer;
  padding: 0 4px;
}

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

.modal-body {
  padding: 20px;
  overflow-y: auto;
}

.modal-body .form-group {
  margin-bottom: 14px;
}

.modal-body textarea {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 14px;
  outline: none;
  resize: vertical;
  font-family: inherit;
}

.modal-body textarea:focus { border-color: var(--green); }

.modal-body select {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 14px;
  outline: none;
}

.modal-body select:focus { border-color: var(--green); }

/* Profile picture */
.profile-pic-section {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}

.profile-pic-preview {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--bg-hover);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  color: var(--text-secondary);
  overflow: hidden;
  flex-shrink: 0;
}

.profile-pic-preview img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.profile-pic-actions {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.profile-pic-hint {
  font-size: 11px;
  color: var(--text-secondary);
}

.profile-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
  margin-top: 8px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

.profile-msg {
  font-size: 13px;
  flex: 1;
}

.profile-msg.success { color: var(--green); }
.profile-msg.error { color: var(--danger); }

/* === NEW CHAT BUTTON === */
.btn-new-chat {
  width: 36px;
  height: 36px;
  border-radius: var(--radius);
  background: var(--green);
  border: none;
  color: #fff;
  font-size: 20px;
  cursor: pointer;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

.btn-new-chat:hover { opacity: 0.9; }

/* New chat compose panel */
.new-chat-panel {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.new-chat-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 20px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
}

.new-chat-header h3 {
  font-size: 15px;
  font-weight: 500;
  flex: 1;
}

.new-chat-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 20px;
  gap: 14px;
}

.new-chat-body .form-group {
  margin-bottom: 0;
}

.new-chat-body .form-group input,
.new-chat-body .form-group textarea {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 14px;
  outline: none;
  font-family: inherit;
}

.new-chat-body .form-group input:focus,
.new-chat-body .form-group textarea:focus {
  border-color: var(--green);
}

.new-chat-body .form-group textarea {
  resize: vertical;
  min-height: 80px;
}

.new-chat-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.new-chat-msg {
  font-size: 13px;
  flex: 1;
}

.new-chat-msg.error { color: var(--danger); }
.new-chat-msg.success { color: var(--green); }

/* === IMAGE PREVIEW === */
.image-preview-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 20px;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
}

.image-preview-thumb {
  width: 48px;
  height: 48px;
  border-radius: 6px;
  object-fit: cover;
  border: 1px solid var(--border);
}

.image-preview-info {
  flex: 1;
  font-size: 13px;
  color: var(--text-secondary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.image-preview-remove {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 18px;
  cursor: pointer;
  padding: 4px;
}

.image-preview-remove:hover { color: var(--danger); }

/* File attach button */
.btn-attach {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 20px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.btn-attach:hover {
  border-color: var(--green);
  color: var(--green);
}

/* === MEDIA MESSAGES === */
.media-message {
  cursor: pointer;
  border-radius: 6px;
  overflow: hidden;
  max-width: 280px;
}

.media-message img.message-image {
  display: block;
  max-width: 280px;
  max-height: 300px;
  border-radius: 6px;
  object-fit: cover;
}

.media-message video.message-video {
  display: block;
  max-width: 280px;
  max-height: 300px;
  border-radius: 6px;
  background: #000;
}

.media-caption {
  padding: 4px 0 0;
  font-size: 13px;
  line-height: 1.3;
}

.media-message.doc {
  cursor: default;
}

.doc-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  background: rgba(255,255,255,0.05);
  border-radius: 6px;
  text-decoration: none;
  color: var(--text);
  border: 1px solid var(--border);
}

.doc-link:hover {
  background: rgba(255,255,255,0.1);
}

.doc-icon {
  font-size: 28px;
  flex-shrink: 0;
}

/* === LIGHTBOX === */
.lightbox-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.9);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  cursor: pointer;
}

.lightbox-overlay img {
  max-width: 90vw;
  max-height: 90vh;
  object-fit: contain;
  border-radius: 4px;
  cursor: default;
}

.lightbox-close {
  position: absolute;
  top: 16px;
  right: 24px;
  background: none;
  border: none;
  color: #fff;
  font-size: 32px;
  cursor: pointer;
  z-index: 2001;
  opacity: 0.8;
}

.lightbox-close:hover { opacity: 1; }