/* 
 * ChatSim Conversation Builder & Simulator
 * Core stylesheet featuring custom styling for the dashboard and the phone mockup.
 */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=SF+Pro+Display:wght@400;500;600;700&family=Roboto:wght@400;500;700&display=swap');

/* CSS Variables */
:root {
  --font-builder: 'Inter', sans-serif;
  --bg-builder: #0f172a;
  --panel-bg: rgba(30, 41, 59, 0.7);
  --panel-border: rgba(255, 255, 255, 0.08);
  --accent-color: #6366f1;
  --accent-hover: #4f46e5;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --border-light: rgba(255, 255, 255, 0.1);
  --danger-color: #ef4444;
  --danger-hover: #dc2626;

  /* Chat Colors - Default Light */
  --sim-font: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  --sim-header-bg: #f5f6fb;
  --sim-body-bg: #eef0f8;
  --sim-bubble-in: #ffffff;
  --sim-bubble-out: #dbe2ff;
  --sim-bubble-in-border: none;
  --sim-bubble-out-border: none;
  --sim-text-primary: #171a2b;
  --sim-text-secondary: #636a85;
  --sim-text-meta: #878da6;
  --sim-check-blue: #4f6ef7;
  --sim-check-grey: #878da6;
  --sim-footer-bg: #f5f6fb;
  --sim-input-bg: #ffffff;
  --sim-border: #e3e6f1;
  /* System variables */
  --phone-width: 390px;
  --phone-height: 840px;
}

/* Dark Mode Chat Variables */
.sim-dark {
  --sim-header-bg: #1b1f33;
  --sim-body-bg: #0f1221;
  --sim-bubble-in: #1f2439;
  --sim-bubble-out: #3a3f9e;
  --sim-text-primary: #eceef7;
  --sim-text-secondary: #979db5;
  --sim-text-meta: #979db5;
  --sim-footer-bg: #1b1f33;
  --sim-input-bg: #282d47;
  --sim-border: #2a2f49;
}

/* Reset & Global */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-builder);
  background: radial-gradient(circle at 10% 20%, rgb(4, 16, 32) 0.1%, rgb(0, 0, 5) 90.1%);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

/* Header */
header.main-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 2rem;
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--panel-border);
  z-index: 100;
}

header.main-header h1 {
  font-size: 1.5rem;
  font-weight: 700;
  background: linear-gradient(135deg, #6366f1 0%, #3b82f6 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

header.main-header h1 span.logo-badge {
  font-size: 0.75rem;
  background: rgba(99, 102, 241, 0.2);
  color: var(--accent-color);
  padding: 0.2rem 0.5rem;
  border-radius: 9999px;
  border: 1px solid rgba(99, 102, 241, 0.3);
  font-weight: 500;
  letter-spacing: 0.05em;
  -webkit-text-fill-color: initial;
}

.header-actions {
  display: flex;
  gap: 0.75rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-builder);
  font-size: 0.875rem;
  font-weight: 500;
  padding: 0.625rem 1.25rem;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  transition: all 0.2s ease-in-out;
}

.btn-primary {
  background-color: var(--accent-color);
  color: #ffffff;
}

.btn-primary:hover {
  background-color: var(--accent-hover);
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.btn-secondary {
  background-color: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--panel-border);
  color: var(--text-primary);
}

.btn-secondary:hover {
  background-color: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.2);
}

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

.btn-danger:hover {
  background-color: var(--danger-hover);
  box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
}

.btn-sm {
  padding: 0.375rem 0.75rem;
  font-size: 0.8rem;
  border-radius: 6px;
}

.btn-icon-only {
  padding: 0.5rem;
  border-radius: 50%;
  aspect-ratio: 1/1;
  width: 2.25rem;
  height: 2.25rem;
}

/* Dashboard Container */
.dashboard {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  flex: 1;
  gap: 2rem;
  padding: 2rem;
  max-width: 1600px;
  margin: 0 auto;
  width: 100%;
  transition: grid-template-columns 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.dashboard.sidebar-collapsed {
  grid-template-columns: 0fr 2fr;
  gap: 0;
}

.dashboard.sidebar-collapsed #builder-panel {
  opacity: 0;
  pointer-events: none;
  visibility: hidden;
  margin: 0;
  padding: 0;
  border: none;
  overflow: hidden;
  width: 0;
  min-width: 0;
}

#builder-panel {
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.dashboard.sidebar-collapsed #builder-panel * {
  display: none !important;
}

@media (max-width: 1024px) {
  .dashboard {
    grid-template-columns: 1fr;
    padding: 1rem;
    gap: 1.5rem;
  }
  .dashboard.sidebar-collapsed {
    grid-template-columns: 1fr;
  }
}

/* Panel Styles */
.panel {
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-radius: 16px;
  display: flex;
  flex-direction: column;
  height: calc(100vh - 120px);
  overflow: hidden;
}

@media (max-width: 1024px) {
  .panel {
    height: auto;
    max-height: 800px;
  }
}

.panel-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--panel-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.panel-title {
  font-size: 1.1rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.panel-body {
  padding: 1.5rem;
  overflow-y: auto;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

/* Custom Scrollbar for Builder */
.panel-body::-webkit-scrollbar,
.message-timeline::-webkit-scrollbar,
.modal-body::-webkit-scrollbar {
  width: 6px;
}

.panel-body::-webkit-scrollbar-track,
.message-timeline::-webkit-scrollbar-track,
.modal-body::-webkit-scrollbar-track {
  background: transparent;
}

.panel-body::-webkit-scrollbar-thumb,
.message-timeline::-webkit-scrollbar-thumb,
.modal-body::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 3px;
}

.panel-body::-webkit-scrollbar-thumb:hover,
.message-timeline::-webkit-scrollbar-thumb:hover,
.modal-body::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.2);
}

/* Sections inside Builder Panel */
.builder-section {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.section-label {
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  font-weight: 600;
}

/* Participants list cards */
.participants-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 0.75rem;
}

.participant-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-light);
  border-radius: 10px;
  padding: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: border-color 0.2s ease;
}

.participant-card:hover {
  border-color: rgba(255, 255, 255, 0.2);
}

.participant-info {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.participant-avatar-preview {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 600;
  font-size: 0.8rem;
  background-color: var(--accent-color);
  background-size: cover;
  background-position: center;
}

.participant-details {
  display: flex;
  flex-direction: column;
}

.participant-name-text {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-primary);
}

.participant-role {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.participant-role.you-badge {
  color: var(--accent-color);
  font-weight: 500;
}

.participant-actions {
  display: flex;
  gap: 0.25rem;
}

/* Timeline/Message Sequence List */
.message-timeline {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  max-height: 400px;
  overflow-y: auto;
  padding-right: 0.5rem;
  border: 1px solid var(--border-light);
  border-radius: 10px;
  padding: 0.75rem;
  background: rgba(0, 0, 0, 0.15);
}

.timeline-empty {
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.9rem;
  padding: 2rem 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

.timeline-empty-icon {
  font-size: 1.5rem;
  opacity: 0.5;
}

.timeline-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-light);
  padding: 0.75rem;
  border-radius: 8px;
  transition: all 0.2s ease;
  user-select: none;
}

.timeline-item:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.15);
}

.timeline-item.playing-now {
  border-color: var(--accent-color);
  background: rgba(99, 102, 241, 0.05);
  box-shadow: 0 0 8px rgba(99, 102, 241, 0.2);
}

.timeline-item.editing-now {
  border-color: #3b82f6;
  background: rgba(59, 130, 246, 0.1);
  box-shadow: 0 0 8px rgba(59, 130, 246, 0.3);
}

.drag-handle {
  cursor: grab;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  opacity: 0.5;
  transition: opacity 0.2s;
}

.drag-handle:hover {
  opacity: 1;
}

.timeline-item-meta {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  min-width: 80px;
}

.timeline-sender {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent-color);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 90px;
}

.timeline-timing {
  font-size: 0.75rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.timeline-text {
  flex: 1;
  font-size: 0.875rem;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  padding: 0 0.5rem;
}

.timeline-actions {
  display: flex;
  gap: 0.25rem;
}

/* Simulation Settings */
.simulation-controls-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-light);
  border-radius: 12px;
  padding: 0.75rem 1rem;
  gap: 1rem;
}

.playback-buttons {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.speed-control {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.speed-select {
  background: rgba(15, 23, 42, 0.8);
  border: 1px solid var(--border-light);
  color: var(--text-primary);
  font-family: var(--font-builder);
  padding: 0.3rem 0.5rem;
  border-radius: 6px;
  cursor: pointer;
  outline: none;
}

/* Input Fields & Forms */
.form-group-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

@media (max-width: 640px) {
  .form-group-row {
    grid-template-columns: 1fr;
  }
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-label {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.form-input,
.form-select {
  background: rgba(15, 23, 42, 0.8);
  border: 1px solid var(--border-light);
  border-radius: 8px;
  padding: 0.625rem 0.75rem;
  color: var(--text-primary);
  font-family: var(--font-builder);
  font-size: 0.875rem;
  transition: border-color 0.2s, box-shadow 0.2s;
  outline: none;
  width: 100%;
}

.form-input:focus,
.form-select:focus {
  border-color: var(--accent-color);
  box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.2);
}

.form-input::placeholder {
  color: rgba(255, 255, 255, 0.25);
}

/* Checkbox Switch styling */
.switch-label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  user-select: none;
  font-size: 0.85rem;
  color: var(--text-primary);
  margin-top: 0.5rem;
}

.switch-checkbox {
  appearance: none;
  width: 2.5rem;
  height: 1.25rem;
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: 9999px;
  position: relative;
  cursor: pointer;
  transition: background-color 0.2s;
  outline: none;
  border: 1px solid var(--border-light);
}

.switch-checkbox::before {
  content: '';
  position: absolute;
  width: 1rem;
  height: 1rem;
  border-radius: 50%;
  background-color: white;
  top: 1px;
  left: 2px;
  transition: transform 0.2s;
}

.switch-checkbox:checked {
  background-color: var(--accent-color);
}

.switch-checkbox:checked::before {
  transform: translateX(1.1rem);
}

/* Modals */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(8px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 1rem;
}

.modal-overlay.active {
  display: flex;
}

.modal-content {
  background: #1e293b;
  border: 1px solid var(--panel-border);
  border-radius: 16px;
  width: 100%;
  max-width: 480px;
  display: flex;
  flex-direction: column;
  max-height: 90vh;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  animation: modalSlideUp 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

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

.modal-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border-light);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-title {
  font-size: 1.1rem;
  font-weight: 600;
}

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

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

.modal-body {
  padding: 1.5rem;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.modal-footer {
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--border-light);
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
}


/* --- PHONE SIMULATOR (Right Pane) --- */

.simulator-container {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

/* Smartphone Wrapper */
.phone-mockup {
  width: var(--phone-width);
  height: var(--phone-height);
  background: #000000;
  border-radius: 44px;
  border: 9px solid #1c1c1e;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.9), 0 0 0 1px rgba(255,255,255,0.15);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: all 0.3s ease;
}

/* Status Bar & Notch Mockup */
.phone-notch {
  width: 110px;
  height: 26px;
  background: #000000;
  position: absolute;
  top: 9px;
  left: 50%;
  transform: translateX(-50%);
  border-radius: 20px;
  z-index: 50;
  display: flex;
  justify-content: center;
  align-items: center;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.phone-speaker {
  width: 35px;
  height: 4px;
  background: #1c1c1e;
  border-radius: 2px;
  display: none;
}

.phone-status-bar {
  height: 44px;
  padding: 14px 28px 0 28px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 0.75rem;
  font-weight: 600;
  z-index: 40;
  position: relative;
  background: var(--sim-header-bg);
  color: var(--sim-text-primary);
  transition: background-color 0.3s, color 0.3s;
}

/* iOS vs Android dynamic phone layouts */
.phone-mockup.os-android {
  border-radius: 28px;
  border-width: 8px;
}

.phone-mockup.os-android .phone-notch {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  top: 11px;
  left: 50%;
  transform: translateX(-50%);
  border: none;
}

.phone-mockup.os-android .phone-speaker {
  display: none;
}

.phone-mockup.os-android .phone-status-bar {
  padding: 10px 20px 0 20px;
  height: 34px;
}

/* Chat Screen Inside Phone */
.chat-window {
  flex: 1;
  display: flex;
  flex-direction: column;
  font-family: var(--sim-font);
  background-color: var(--sim-body-bg);
  position: relative;
  height: calc(100% - 35px); /* Less status bar */
  overflow: hidden;
  transition: background-color 0.3s;
}

/* Header UI */
.sim-header {
  background-color: var(--sim-header-bg);
  border-bottom: 1px solid var(--sim-border);
  padding: 8px 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  z-index: 10;
  position: relative;
  transition: background-color 0.3s, border-color 0.3s;
  box-shadow: 0 1px 3px rgba(0,0,0,0.06);
}

.sim-header-left {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
  min-width: 0;
}

.sim-back-btn {
  color: #007aff; /* iOS blue tint */
  cursor: pointer;
  display: flex;
  align-items: center;
  font-size: 1rem;
}

.os-android .sim-back-btn {
  color: var(--sim-text-primary);
}

.sim-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: #ccc;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: bold;
  font-size: 0.95rem;
  background-size: cover;
  background-position: center;
  flex-shrink: 0;
}

.sim-chat-info {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.sim-chat-name {
  font-size: 0.925rem;
  font-weight: 600;
  color: var(--sim-text-primary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  transition: color 0.3s;
}

.sim-chat-status {
  font-size: 0.725rem;
  color: var(--sim-text-secondary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  transition: color 0.3s;
}

.sim-chat-status.online {
  color: var(--accent-color);
  font-weight: 500;
}

.sim-header-actions {
  display: flex;
  gap: 14px;
  color: #007aff;
  font-size: 1.1rem;
  align-items: center;
}

.os-android .sim-header-actions {
  color: var(--sim-text-primary);
  opacity: 0.8;
}

/* Chat Body (Messages container) */
.sim-chat-body {
  flex: 1;
  overflow-y: auto;
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 5;
  position: relative;
}

/* Custom Scrollbar for Phone mockup */
.sim-chat-body::-webkit-scrollbar {
  width: 4px;
}
.sim-chat-body::-webkit-scrollbar-track {
  background: transparent;
}
.sim-chat-body::-webkit-scrollbar-thumb {
  background: rgba(0, 0, 0, 0.15);
  border-radius: 2px;
}
.sim-dark .sim-chat-body::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15);
}

/* Messages Date Separator */
.sim-date-divider {
  align-self: center;
  background-color: rgba(225, 245, 254, 0.9);
  color: #54656f;
  font-size: 0.675rem;
  font-weight: 600;
  padding: 5px 12px;
  border-radius: 7px;
  box-shadow: 0 1px 0.5px rgba(11,20,26,.08);
  margin: 8px 0;
  text-transform: uppercase;
  z-index: 5;
}

.sim-dark .sim-date-divider {
  background-color: #182229;
  color: #8696a0;
  box-shadow: 0 1px 0.5px rgba(0,0,0,.15);
}

/* Message Bubble */
.sim-msg-wrapper {
  display: flex;
  flex-direction: column;
  width: 100%;
  position: relative;
  z-index: 5;
  animation: simMsgSlideIn 0.25s cubic-bezier(0.1, 0.8, 0.2, 1) forwards;
}

@keyframes simMsgSlideIn {
  from {
    opacity: 0;
    transform: translateY(12px) scale(0.97);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.sim-msg-bubble {
  max-width: 82%;
  min-width: 60px;
  padding: 6px 8px 6px 10px;
  border-radius: 8px;
  font-size: 0.875rem;
  line-height: 1.25;
  color: var(--sim-text-primary);
  position: relative;
  box-shadow: 0 1px 0.5px rgba(11,20,26,.13);
  word-wrap: break-word;
  transition: background-color 0.3s, color 0.3s;
}

/* Sender Name inside bubble (For group chats) */
.sim-msg-sender {
  font-weight: 600;
  font-size: 0.775rem;
  margin-bottom: 2px;
  display: block;
}

/* Bubble Placements */
.sim-msg-wrapper.in {
  align-items: flex-start;
}

.sim-msg-wrapper.in .sim-msg-bubble {
  background-color: var(--sim-bubble-in);
  border-top-left-radius: 0; /* Tail spot */
}

.sim-msg-wrapper.out {
  align-items: flex-end;
}

.sim-msg-wrapper.out .sim-msg-bubble {
  background-color: var(--sim-bubble-out);
  border-top-right-radius: 0; /* Tail spot */
}

/* Bubbles text content */
.sim-msg-text {
  margin-right: 28px; /* Room for timestamp */
  display: block;
}

/* Text attachment image */
.sim-msg-image {
  max-width: 100%;
  border-radius: 6px;
  margin-bottom: 4px;
  display: block;
  object-fit: cover;
  max-height: 180px;
  width: 100%;
}

/* Message Meta (Time + Checkmarks) */
.sim-msg-meta {
  float: right;
  display: inline-flex;
  align-items: center;
  gap: 3px;
  font-size: 0.65rem;
  color: var(--sim-text-meta);
  position: absolute;
  right: 7px;
  bottom: 4px;
}

/* Double Tails styling using border tricks */
.sim-msg-bubble::before {
  content: '';
  position: absolute;
  top: 0;
  width: 0;
  height: 0;
  border: 6px solid transparent;
}

.sim-msg-wrapper.in .sim-msg-bubble::before {
  left: -6px;
  border-top-color: var(--sim-bubble-in);
  border-right-color: var(--sim-bubble-in);
  display: var(--sim-bubble-in-border, block);
}

.sim-msg-wrapper.out .sim-msg-bubble::before {
  right: -6px;
  border-top-color: var(--sim-bubble-out);
  border-left-color: var(--sim-bubble-out);
  display: var(--sim-bubble-out-border, block);
}

/* Consecutive messages remove tails for styling cleaness */
.sim-msg-wrapper.consecutive .sim-msg-bubble {
  border-radius: 8px !important;
}

.sim-msg-wrapper.consecutive .sim-msg-bubble::before {
  display: none !important;
}

/* Typing Indicator Bubble */
.sim-typing-indicator {
  display: flex;
  align-items: center;
  gap: 3px;
  padding: 8px 12px;
  background-color: var(--sim-bubble-in);
  border-radius: 8px;
  border-top-left-radius: 0;
  box-shadow: 0 1px 0.5px rgba(11,20,26,.13);
  align-self: flex-start;
  margin-bottom: 4px;
  min-width: 50px;
  position: relative;
}

.sim-typing-indicator::before {
  content: '';
  position: absolute;
  top: 0;
  left: -6px;
  width: 0;
  height: 0;
  border: 6px solid transparent;
  border-top-color: var(--sim-bubble-in);
  border-right-color: var(--sim-bubble-in);
}

.sim-typing-dot {
  width: 6px;
  height: 6px;
  background-color: var(--sim-text-secondary);
  border-radius: 50%;
  animation: typingBounce 1s infinite ease-in-out;
}

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

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

@keyframes typingBounce {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-4px);
  }
}

/* Bottom Footer (Input Area) */
.sim-footer {
  background-color: var(--sim-footer-bg);
  padding: 6px 10px;
  display: flex;
  align-items: center;
  gap: 8px;
  z-index: 10;
  position: relative;
  transition: background-color 0.3s;
}

.sim-footer-actions {
  color: #007aff;
  font-size: 1.3rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.os-android .sim-footer-actions {
  color: var(--sim-text-secondary);
}

.sim-input-container {
  flex: 1;
  background-color: var(--sim-input-bg);
  border: 1px solid var(--sim-border);
  border-radius: 18px;
  padding: 6px 12px;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: background-color 0.3s, border-color 0.3s;
}

.sim-input-placeholder {
  color: var(--sim-text-secondary);
  font-size: 0.875rem;
  user-select: none;
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.sim-footer-right-btn {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  color: #007aff;
  cursor: pointer;
}

.os-android .sim-footer-right-btn {
  color: #ffffff;
  background-color: var(--accent-color);
}

/* Checkbox Checkmark Icon Simulation CSS */
.checkmark-icon {
  display: inline-flex;
  position: relative;
  width: 14px;
  height: 10px;
}

.checkmark-icon::before,
.checkmark-icon::after {
  content: '';
  position: absolute;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
}

/* Single tick */
.checkmark-icon.single::before {
  width: 3px;
  height: 7px;
  transform: rotate(45deg);
  top: 1px;
  left: 4px;
}

/* Double tick */
.checkmark-icon.double::before {
  width: 3px;
  height: 7px;
  transform: rotate(45deg);
  top: 1px;
  left: 2px;
}
.checkmark-icon.double::after {
  width: 3px;
  height: 7px;
  transform: rotate(45deg);
  top: 1px;
  left: 7px;
}

.checkmark-icon.blue {
  color: var(--sim-check-blue);
}

.checkmark-icon.grey {
  color: var(--sim-check-grey);
}

/* Phone bottom home indicator */
.phone-home-indicator {
  height: 15px;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--sim-footer-bg);
  position: relative;
  z-index: 10;
  transition: background-color 0.3s;
}

.phone-home-indicator::before {
  content: '';
  width: 120px;
  height: 5px;
  background: var(--sim-text-primary);
  opacity: 0.3;
  border-radius: 10px;
}

.os-android .phone-home-indicator {
  display: none;
}

/* Helper spacing / classes */
.flex-row-center {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.d-none {
  display: none !important;
}

.no-select {
  user-select: none;
}

/* Standalone Mobile View Page (412x915 ratio) */
body.mobile-view-page {
  background: radial-gradient(circle at 10% 20%, rgb(4, 16, 32) 0.1%, rgb(0, 0, 5) 90.1%);
  color: var(--text-primary);
  height: 100vh;
  width: 100vw;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0;
  overflow: hidden;
}

body.mobile-view-page .phone-mockup {
  width: 412px !important;
  height: 915px !important;
  border-radius: 48px;
  border: 10px solid #1c1c1e;
  box-shadow: 0 30px 60px -15px rgba(0, 0, 0, 0.9), 0 0 0 1px rgba(255,255,255,0.15);
}

/* Scale down on small screens to fit the viewport height */
@media (max-height: 940px) {
  body.mobile-view-page .phone-mockup {
    transform: scale(0.9);
    transform-origin: center center;
  }
}

@media (max-height: 850px) {
  body.mobile-view-page .phone-mockup {
    transform: scale(0.8);
  }
}

@media (max-height: 760px) {
  body.mobile-view-page .phone-mockup {
    transform: scale(0.7);
  }
}

@media (max-height: 660px) {
  body.mobile-view-page .phone-mockup {
    transform: scale(0.6);
  }
}

/* Simulated In-App Browser */
.in-app-browser {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: #ffffff;
  z-index: 200; /* Over everything */
  display: flex;
  flex-direction: column;
  animation: browserSlideUp 0.35s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes browserSlideUp {
  from {
    transform: translateY(100%);
  }
  to {
    transform: translateY(0);
  }
}

.sim-dark .in-app-browser {
  background: #1c1c1e;
}

.browser-header {
  height: 48px;
  background: #f8f9fa;
  border-bottom: 1px solid #e9edef;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 12px;
  flex-shrink: 0;
}

.sim-dark .browser-header {
  background: #2c2c2e;
  border-bottom-color: #3a3a3c;
}

.browser-close-btn {
  background: none;
  border: none;
  color: #007aff;
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  font-family: inherit;
}

.os-android .browser-close-btn {
  color: var(--sim-text-primary);
}

.browser-url-bar {
  flex: 1;
  margin: 0 16px;
  background: #e9ecef;
  border-radius: 10px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 8px;
  max-width: 220px;
  overflow: hidden;
}

.sim-dark .browser-url-bar {
  background: #1c1c1e;
}

.browser-url-text {
  font-size: 0.775rem;
  color: #495057;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.sim-dark .browser-url-text {
  color: #a8a8a8;
}

.browser-action-btn {
  background: none;
  border: none;
  color: #007aff;
  font-size: 0.95rem;
  cursor: pointer;
}

.os-android .browser-action-btn {
  color: var(--sim-text-primary);
}

.browser-content {
  flex: 1;
  position: relative;
  overflow: hidden;
}

.browser-iframe {
  width: 100%;
  height: 100%;
  border: none;
}

/* Browser Mock Page (if X-Frame-Options blocks embed) */
.browser-mock-page {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: #f8fafc;
  color: #0f172a;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  text-align: center;
  box-sizing: border-box;
}

.sim-dark .browser-mock-page {
  background: #121212;
  color: #f8fafc;
}

.mock-page-header {
  margin-bottom: 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.mock-page-header h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin: 0.25rem 0;
}

.mock-page-header p {
  font-size: 0.8rem;
  color: #64748b;
}

.mock-page-body {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  padding: 1.25rem;
  width: 100%;
  max-width: 320px;
  box-shadow: 0 4px 6px -1px rgba(0,0,0,0.05);
}

.sim-dark .mock-page-body {
  background: #1e1e1e;
  border-color: #2e2e2e;
}

.mock-desc {
  font-size: 0.775rem;
  line-height: 1.4;
  color: #475569;
}

.sim-dark .mock-desc {
  color: #94a3b8;
}

/* Link Preview Card inside Bubble */
.sim-link-preview {
  margin-top: 4px;
  margin-bottom: 6px;
  border-radius: 6px;
  background: rgba(0, 0, 0, 0.04);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  cursor: pointer;
  border: 1px solid rgba(0,0,0,0.05);
  transition: background-color 0.2s;
  text-decoration: none !important;
}

.sim-dark .sim-link-preview {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255,255,255,0.05);
}

.sim-link-preview:hover {
  background: rgba(0, 0, 0, 0.07);
}

.sim-dark .sim-link-preview:hover {
  background: rgba(255, 255, 255, 0.09);
}

.sim-link-thumb {
  width: 100%;
  height: 125px;
  object-fit: cover;
  background: #ccc;
  display: block;
}

.sim-link-details {
  padding: 8px 10px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  border-left: 2px solid var(--accent-color);
}

.sim-link-title {
  font-size: 0.825rem;
  font-weight: 600;
  color: var(--sim-text-primary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.sim-link-desc {
  font-size: 0.725rem;
  color: var(--sim-text-secondary);
  line-height: 1.3;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sim-link-domain {
  font-size: 0.65rem;
  color: var(--sim-text-meta);
  text-transform: lowercase;
  margin-top: 2px;
}