/* ============================================
   GH0S1 COMMUNITY - FUTURISTIC CYBERPUNK THEME
   Black-Red Metallic Design
   ============================================ */

/* CSS Variables for Theming */
:root {
  /* Dark Mode (Default) */
  --bg-primary: #0a0a0a;
  --bg-secondary: #111111;
  --bg-tertiary: #1a1a1a;
  --bg-card: #141414;
  --bg-hover: #1f1f1f;
  
  --accent-primary: #ff0033;
  --accent-secondary: #cc0029;
  --accent-glow: rgba(255, 0, 51, 0.5);
  --accent-light: #ff3366;
  
  --text-primary: #ffffff;
  --text-secondary: #b3b3b3;
  --text-muted: #666666;
  
  --border-color: #2a2a2a;
  --border-accent: #ff0033;
  
  --success: #00ff66;
  --warning: #ffaa00;
  --error: #ff0033;
  --info: #00ccff;
  
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.5);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.6);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.8);
  --shadow-glow: 0 0 20px rgba(255, 0, 51, 0.3);
  --shadow-glow-strong: 0 0 40px rgba(255, 0, 51, 0.5);
  
  --gradient-metallic: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 50%, #1a1a1a 100%);
  --gradient-red: linear-gradient(135deg, #ff0033 0%, #cc0029 100%);
  --gradient-dark: linear-gradient(180deg, #0a0a0a 0%, #111111 100%);
  
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
  
  --font-primary: 'Orbitron', 'Rajdhani', sans-serif;
  --font-secondary: 'Rajdhani', 'Segoe UI', sans-serif;
  
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
}

/* Light Mode */
[data-theme="light"] {
  --bg-primary: #f5f5f5;
  --bg-secondary: #ffffff;
  --bg-tertiary: #eeeeee;
  --bg-card: #ffffff;
  --bg-hover: #e8e8e8;
  
  --text-primary: #1a1a1a;
  --text-secondary: #4a4a4a;
  --text-muted: #888888;
  
  --border-color: #dddddd;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.15);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.2);
}

/* Reset & Base */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: var(--font-secondary);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.6;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

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

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

::-webkit-scrollbar-thumb {
  background: var(--accent-primary);
  border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--accent-light);
}

/* Selection */
::selection {
  background: var(--accent-primary);
  color: var(--text-primary);
}

/* ============================================
   ANIMATED BACKGROUND
   ============================================ */
#canvas-background {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  pointer-events: none;
}

.background-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(ellipse at center, transparent 0%, var(--bg-primary) 70%);
  z-index: -1;
  pointer-events: none;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-primary);
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.glow-text {
  text-shadow: 0 0 10px var(--accent-glow), 0 0 20px var(--accent-glow), 0 0 30px var(--accent-glow);
}

.gradient-text {
  background: var(--gradient-red);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ============================================
   HEADER
   ============================================ */
.main-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 70px;
  background: rgba(10, 10, 10, 0.9);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2rem;
  transition: all var(--transition-normal);
}

[data-theme="light"] .main-header {
  background: rgba(245, 245, 245, 0.9);
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: var(--gradient-red);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-primary);
  font-size: 1.2rem;
  font-weight: 900;
  color: white;
  box-shadow: var(--shadow-glow);
  animation: pulse-glow 2s ease-in-out infinite;
}

@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 10px var(--accent-glow); }
  50% { box-shadow: 0 0 25px var(--accent-glow-strong); }
}

.logo-text {
  font-family: var(--font-primary);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.1em;
}

.logo-text span {
  color: var(--accent-primary);
}

.header-controls {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* ============================================
   TOGGLE SWITCHES
   ============================================ */
.toggle-btn {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.toggle-btn:hover {
  border-color: var(--accent-primary);
  box-shadow: var(--shadow-glow);
}

.toggle-option {
  padding: 0.4rem 0.8rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  transition: all var(--transition-fast);
}

.toggle-option.active {
  background: var(--gradient-red);
  color: white;
  box-shadow: var(--shadow-sm);
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero-section {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 100px 2rem 2rem;
  position: relative;
  overflow: hidden;
}

.hero-content {
  text-align: center;
  max-width: 900px;
  z-index: 1;
}

.hero-title {
  font-size: clamp(2.5rem, 8vw, 5rem);
  margin-bottom: 1rem;
  line-height: 1.1;
}

.hero-subtitle {
  font-size: clamp(1rem, 3vw, 1.5rem);
  color: var(--text-secondary);
  margin-bottom: 2rem;
  font-weight: 500;
}

.hero-tagline {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 3rem;
}

.tag-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  font-size: 0.9rem;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.tag-item:hover {
  border-color: var(--accent-primary);
  transform: translateY(-2px);
}

.tag-item i {
  color: var(--accent-primary);
}

/* ============================================
   CARDS
   ============================================ */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-red);
  transform: scaleX(0);
  transition: transform var(--transition-normal);
}

.card:hover::before {
  transform: scaleX(1);
}

.card:hover {
  border-color: var(--border-accent);
  box-shadow: var(--shadow-glow);
  transform: translateY(-4px);
}

.card-title {
  font-size: 1.5rem;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.card-title i {
  color: var(--accent-primary);
}

/* ============================================
   FORMS
   ============================================ */
.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 600;
  color: var(--text-secondary);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.form-input {
  width: 100%;
  padding: 1rem 1.25rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 1rem;
  font-family: var(--font-secondary);
  transition: all var(--transition-fast);
}

.form-input:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(255, 0, 51, 0.1);
}

.form-input::placeholder {
  color: var(--text-muted);
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  padding: 1rem 2rem;
  font-size: 1rem;
  font-weight: 600;
  font-family: var(--font-primary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
  width: 300px;
  height: 300px;
}

.btn-primary {
  background: var(--gradient-red);
  color: white;
  box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow-strong);
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

.btn-icon {
  width: 48px;
  height: 48px;
  padding: 0;
  border-radius: 50%;
}

/* ============================================
   TAB SWITCHER
   ============================================ */
.tab-switcher {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 2rem;
  padding: 0.5rem;
  background: var(--bg-tertiary);
  border-radius: var(--radius-lg);
}

.tab-btn {
  flex: 1;
  padding: 0.875rem 1.5rem;
  background: transparent;
  border: none;
  border-radius: var(--radius-md);
  color: var(--text-muted);
  font-family: var(--font-primary);
  font-size: 0.9rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.tab-btn.active {
  background: var(--gradient-red);
  color: white;
  box-shadow: var(--shadow-sm);
}

.tab-btn:hover:not(.active) {
  color: var(--text-primary);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
  animation: fadeIn 0.3s ease;
}

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

/* ============================================
   AUTH SECTION
   ============================================ */
.auth-section {
  padding: 4rem 2rem;
  display: flex;
  justify-content: center;
}

.auth-card {
  width: 100%;
  max-width: 450px;
}

/* ============================================
   TEMP MAIL SECTION
   ============================================ */
.tempmail-section {
  padding: 4rem 2rem;
  background: var(--gradient-dark);
  border-top: 1px solid var(--border-color);
}

.section-header {
  text-align: center;
  margin-bottom: 3rem;
}

.section-title {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.section-subtitle {
  color: var(--text-secondary);
}

.tempmail-card {
  max-width: 700px;
  margin: 0 auto;
}

.email-display {
  display: flex;
  gap: 1rem;
  margin-bottom: 2rem;
}

.email-box {
  flex: 1;
  padding: 1rem 1.5rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-family: monospace;
  font-size: 1.1rem;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.email-timer {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--accent-primary);
  font-size: 0.9rem;
}

.inbox-container {
  min-height: 300px;
  max-height: 400px;
  overflow-y: auto;
}

.email-item {
  padding: 1rem;
  border-bottom: 1px solid var(--border-color);
  cursor: pointer;
  transition: all var(--transition-fast);
}

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

.email-item.unread {
  border-left: 3px solid var(--accent-primary);
}

.email-sender {
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.email-subject {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 0.25rem;
}

.email-preview {
  color: var(--text-muted);
  font-size: 0.85rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.email-time {
  color: var(--text-muted);
  font-size: 0.8rem;
}

.empty-inbox {
  text-align: center;
  padding: 3rem;
  color: var(--text-muted);
}

.empty-inbox i {
  font-size: 3rem;
  margin-bottom: 1rem;
  opacity: 0.5;
}

/* ============================================
   MESSENGER DASHBOARD
   ============================================ */
.messenger-container {
  display: flex;
  height: 100vh;
  padding-top: 70px;
}

/* Sidebar */
.sidebar {
  width: 350px;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  transition: all var(--transition-normal);
}

.sidebar-header {
  padding: 1.5rem;
  border-bottom: 1px solid var(--border-color);
}

.user-profile {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
}

.user-avatar {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: var(--gradient-red);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
  color: white;
  position: relative;
}

.user-avatar img {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
}

.user-status {
  position: absolute;
  bottom: 2px;
  right: 2px;
  width: 14px;
  height: 14px;
  background: var(--success);
  border: 2px solid var(--bg-secondary);
  border-radius: 50%;
}

.user-info {
  flex: 1;
}

.user-name {
  font-weight: 700;
  font-size: 1.1rem;
}

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

.search-box {
  position: relative;
}

.search-box input {
  width: 100%;
  padding: 0.75rem 1rem 0.75rem 2.5rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  color: var(--text-primary);
  font-size: 0.95rem;
}

.search-box input:focus {
  outline: none;
  border-color: var(--accent-primary);
}

.search-box i {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
}

/* Contacts List */
.contacts-list {
  flex: 1;
  overflow-y: auto;
  padding: 0.5rem;
}

.contacts-section {
  margin-bottom: 1rem;
}

.contacts-section-title {
  padding: 0.5rem 1rem;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.875rem 1rem;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
}

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

.contact-item.active {
  background: rgba(255, 0, 51, 0.1);
  border-left: 3px solid var(--accent-primary);
}

.contact-item.has-notification::after {
  content: '';
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  width: 10px;
  height: 10px;
  background: var(--accent-primary);
  border-radius: 50%;
  animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.2); opacity: 0.7; }
}

.contact-avatar {
  width: 45px;
  height: 45px;
  border-radius: 50%;
  background: var(--bg-tertiary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--text-secondary);
  flex-shrink: 0;
}

.contact-avatar img {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
}

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

.contact-name {
  font-weight: 600;
  margin-bottom: 0.25rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.contact-preview {
  font-size: 0.85rem;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.contact-meta {
  text-align: right;
}

.contact-time {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.contact-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 20px;
  height: 20px;
  padding: 0 6px;
  background: var(--accent-primary);
  border-radius: 10px;
  font-size: 0.75rem;
  font-weight: 700;
  color: white;
  margin-top: 0.25rem;
}

/* Sidebar Footer */
.sidebar-footer {
  padding: 1rem;
  border-top: 1px solid var(--border-color);
  display: flex;
  gap: 0.5rem;
}

.sidebar-btn {
  flex: 1;
  padding: 0.75rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 0.9rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.sidebar-btn:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

/* Chat Area */
.chat-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  background: var(--bg-primary);
}

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

.chat-header-info {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.chat-header-actions {
  display: flex;
  gap: 0.5rem;
}

.chat-header-btn {
  width: 40px;
  height: 40px;
  background: transparent;
  border: 1px solid var(--border-color);
  border-radius: 50%;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.chat-header-btn:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

/* Messages */
.messages-container {
  flex: 1;
  overflow-y: auto;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.message {
  max-width: 70%;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.message.sent {
  align-self: flex-end;
}

.message.received {
  align-self: flex-start;
}

.message-bubble {
  padding: 1rem 1.25rem;
  border-radius: var(--radius-lg);
  word-wrap: break-word;
}

.message.sent .message-bubble {
  background: var(--gradient-red);
  color: white;
  border-bottom-right-radius: 4px;
}

.message.received .message-bubble {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border-bottom-left-radius: 4px;
}

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

.message.sent .message-time {
  text-align: right;
}

/* Chat Input */
.chat-input-container {
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  gap: 1rem;
}

.chat-input-wrapper {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.75rem 1rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
}

.chat-input-wrapper:focus-within {
  border-color: var(--accent-primary);
}

.chat-input {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-size: 1rem;
  resize: none;
  outline: none;
}

.chat-input::placeholder {
  color: var(--text-muted);
}

.chat-action-btn {
  width: 36px;
  height: 36px;
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
}

.chat-action-btn:hover {
  color: var(--accent-primary);
  background: rgba(255, 0, 51, 0.1);
}

.send-btn {
  width: 48px;
  height: 48px;
  background: var(--gradient-red);
  border: none;
  border-radius: 50%;
  color: white;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-glow);
}

.send-btn:hover {
  transform: scale(1.05);
  box-shadow: var(--shadow-glow-strong);
}

/* Empty Chat State */
.empty-chat {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  text-align: center;
  padding: 2rem;
}

.empty-chat i {
  font-size: 5rem;
  margin-bottom: 1.5rem;
  opacity: 0.3;
}

.empty-chat h3 {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
  color: var(--text-secondary);
}

/* ============================================
   MODALS
   ============================================ */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(5px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

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

.modal {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  width: 90%;
  max-width: 500px;
  max-height: 90vh;
  overflow: hidden;
  transform: scale(0.9) translateY(20px);
  transition: all var(--transition-normal);
}

.modal-overlay.active .modal {
  transform: scale(1) translateY(0);
}

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

.modal-title {
  font-size: 1.25rem;
}

.modal-close {
  width: 36px;
  height: 36px;
  background: transparent;
  border: 1px solid var(--border-color);
  border-radius: 50%;
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

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

.modal-body {
  padding: 1.5rem;
  overflow-y: auto;
  max-height: 60vh;
}

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

/* ============================================
   SETTINGS
   ============================================ */
.settings-group {
  margin-bottom: 2rem;
}

.settings-label {
  display: block;
  margin-bottom: 0.75rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.settings-option {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: 0.75rem;
}

.settings-option-text {
  display: flex;
  flex-direction: column;
}

.settings-option-title {
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.settings-option-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Toggle Switch */
.switch {
  position: relative;
  width: 50px;
  height: 26px;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.switch-slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 26px;
  transition: all var(--transition-fast);
}

.switch-slider::before {
  content: '';
  position: absolute;
  height: 20px;
  width: 20px;
  left: 2px;
  bottom: 2px;
  background: var(--text-muted);
  border-radius: 50%;
  transition: all var(--transition-fast);
}

.switch input:checked + .switch-slider {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
}

.switch input:checked + .switch-slider::before {
  transform: translateX(24px);
  background: white;
}

/* ============================================
   SEARCH RESULTS
   ============================================ */
.search-results {
  max-height: 300px;
  overflow-y: auto;
}

.search-result-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  border-bottom: 1px solid var(--border-color);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.search-result-item:hover {
  background: var(--bg-hover);
}

.search-result-info {
  flex: 1;
}

.search-result-name {
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.search-result-id {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.add-contact-btn {
  padding: 0.5rem 1rem;
  background: var(--accent-primary);
  border: none;
  border-radius: var(--radius-md);
  color: white;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.add-contact-btn:hover {
  background: var(--accent-light);
}

/* ============================================
   NOTIFICATIONS
   ============================================ */
.notification {
  position: fixed;
  top: 90px;
  right: 20px;
  padding: 1rem 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 1rem;
  z-index: 3000;
  transform: translateX(120%);
  transition: transform var(--transition-normal);
}

.notification.show {
  transform: translateX(0);
}

.notification.success {
  border-color: var(--success);
}

.notification.error {
  border-color: var(--error);
}

.notification.info {
  border-color: var(--info);
}

.notification-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}

.notification.success .notification-icon {
  background: rgba(0, 255, 102, 0.1);
  color: var(--success);
}

.notification.error .notification-icon {
  background: rgba(255, 0, 51, 0.1);
  color: var(--error);
}

.notification.info .notification-icon {
  background: rgba(0, 204, 255, 0.1);
  color: var(--info);
}

/* ============================================
   LOADING SPINNER
   ============================================ */
.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border-color);
  border-top-color: var(--accent-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(10, 10, 10, 0.9);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  z-index: 4000;
}

.loading-text {
  color: var(--text-secondary);
  font-size: 1.1rem;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 1024px) {
  .sidebar {
    width: 300px;
  }
}

@media (max-width: 768px) {
  .main-header {
    padding: 0 1rem;
  }
  
  .logo-text {
    font-size: 1.2rem;
  }
  
  .toggle-btn {
    padding: 0.3rem;
  }
  
  .toggle-option {
    padding: 0.3rem 0.5rem;
    font-size: 0.75rem;
  }
  
  .hero-section {
    padding: 90px 1rem 2rem;
  }
  
  .auth-section {
    padding: 2rem 1rem;
  }
  
  .card {
    padding: 1.5rem;
  }
  
  .messenger-container {
    flex-direction: column;
  }
  
  .sidebar {
    width: 100%;
    height: 50vh;
    border-right: none;
    border-bottom: 1px solid var(--border-color);
  }
  
  .chat-area {
    height: 50vh;
  }
  
  .message {
    max-width: 85%;
  }
  
  .modal {
    width: 95%;
    margin: 1rem;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 2rem;
  }
  
  .hero-subtitle {
    font-size: 1rem;
  }
  
  .tag-item {
    font-size: 0.8rem;
    padding: 0.4rem 0.8rem;
  }
  
  .btn {
    padding: 0.875rem 1.5rem;
    font-size: 0.9rem;
  }
  
  .email-display {
    flex-direction: column;
  }
  
  .chat-input-container {
    padding: 0.75rem;
    gap: 0.5rem;
  }
  
  .chat-input-wrapper {
    padding: 0.5rem 0.75rem;
  }
  
  .send-btn {
    width: 42px;
    height: 42px;
  }
}

/* ============================================
   UTILITY CLASSES
   ============================================ */
.hidden {
  display: none !important;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.text-center {
  text-align: center;
}

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

/* ============================================
   FOOTER
   ============================================ */
.main-footer {
  padding: 2rem;
  text-align: center;
  border-top: 1px solid var(--border-color);
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-bottom: 1rem;
}

.footer-link {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--accent-primary);
}