/* Ferrixx Forum - Modern Dark Theme CSS */

/* ================================
   CSS Variables & Color Scheme
   ================================ */
:root {
  /* Dark Theme Colors */
  --bg-primary: #0a0e14;
  --bg-secondary: #151a23;
  --bg-tertiary: #1e2531;
  --bg-elevated: #252d3d;
  --bg-overlay: #2d3548;
  
  /* Text Colors */
  --text-primary: #ffffff;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --text-inverse: #1a1f29;
  
  /* Accent Colors */
  --accent: #06b6d4;
  --accent-hover: #0891b2;
  --accent-light: #22d3ee;
  --accent-glow: rgba(6, 182, 212, 0.3);
  
  /* Status Colors */
  --success: #51cf66;
  --warning: #ffd43b;
  --error: #ff6b6b;
  --info: #74c0fc;
  
  /* Border & Shadow */
  --border-color: #3a4250;
  --border-light: #4a5568;
  --shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.4);
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  
  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'SF Mono', Monaco, 'Cascadia Code', monospace;
  
  /* Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  
  /* Transitions */
  --transition: all 0.2s ease;
  --transition-slow: all 0.3s ease;
}

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

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

body {
  font-family: var(--font-family);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  font-size: 0.95rem;
  overflow-x: hidden;
}

/* ================================
   Typography
   ================================ */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.1rem; }
h6 { font-size: 1rem; }

p {
  margin-bottom: var(--spacing-md);
  color: var(--text-secondary);
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--accent-hover);
}

/* ================================
   Layout Components
   ================================ */
.container {
  max-width: 1600px;
  margin: 0 auto;
  padding: 0 var(--spacing-xl);
}

@media (max-width: 1400px) {
  .container {
    max-width: 1200px;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 var(--spacing-sm);
  }
}

/* ================================
   Navigation
   ================================ */
.navbar {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md);
}

.navbar-brand {
  display: flex;
  align-items: center;
}

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

.brand-logo {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
}

.navbar-menu {
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
}

.navbar-nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.nav-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-weight: 500;
  transition: var(--transition);
}

.nav-link:hover,
.nav-link.active {
  background: var(--bg-tertiary);
  color: var(--accent);
}

.nav-link i {
  font-size: 1.1rem;
}

/* User Menu */
.user-menu {
  position: relative;
}

.user-button {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-sm) var(--spacing-md);
  color: var(--text-primary);
  cursor: pointer;
  transition: var(--transition);
}

.user-button:hover {
  background: var(--bg-elevated);
  border-color: var(--accent);
}

.user-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  object-fit: cover;
}

.user-name {
  font-weight: 500;
  max-width: 120px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.user-dropdown {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: var(--spacing-sm);
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  min-width: 200px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: var(--transition);
  z-index: 1000;
}

.user-dropdown.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md);
  color: var(--text-secondary);
  border: none;
  background: none;
  cursor: pointer;
  transition: var(--transition);
  width: 100%;
  text-align: left;
}

.dropdown-item:hover {
  background: var(--bg-overlay);
  color: var(--text-primary);
}

.dropdown-divider {
  height: 1px;
  background: var(--border-color);
  margin: var(--spacing-sm) 0;
}

.dropdown-form {
  width: 100%;
}

/* Auth Buttons */
.auth-buttons {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

/* ================================
   Buttons
   ================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-xl);
  border: 1px solid transparent;
  border-radius: var(--radius-lg);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.1), transparent);
  opacity: 0;
  transition: var(--transition);
}

.btn:hover::before {
  opacity: 1;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-hover));
  color: white;
  box-shadow: 0 4px 12px var(--accent-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px var(--accent-glow);
  color: white;
}

.btn-outline {
  border-color: var(--border-light);
  color: var(--text-secondary);
  background: var(--bg-tertiary);
}

.btn-outline:hover {
  background: var(--bg-elevated);
  color: var(--accent);
  border-color: var(--accent);
  transform: translateY(-2px);
}

.btn-success {
  background: var(--success);
  color: var(--text-inverse);
}

.btn-danger {
  background: var(--error);
  color: var(--text-inverse);
}

/* ================================
   Flash Messages
   ================================ */
.flash-message {
  background: var(--bg-secondary);
  border-left: 4px solid var(--accent);
  animation: slideDown 0.3s ease-out;
}

.flash-message.flash-success {
  border-left-color: var(--success);
}

.flash-message.flash-error {
  border-left-color: var(--error);
}

.flash-message.flash-warning {
  border-left-color: var(--warning);
}

.flash-content {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-lg);
}

.flash-icon {
  font-size: 1.25rem;
  color: var(--accent);
}

.flash-success .flash-icon {
  color: var(--success);
}

.flash-error .flash-icon {
  color: var(--error);
}

.flash-text {
  flex: 1;
  color: var(--text-primary);
}

.flash-close {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: var(--spacing-xs);
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.flash-close:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

/* ================================
   Main Content
   ================================ */
.main-content {
  min-height: calc(100vh - 80px - 120px);
  padding: var(--spacing-xl) 0;
}

/* ================================
   Forum Header
   ================================ */
.forum-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-2xl);
  padding: var(--spacing-2xl);
  background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-color);
  position: relative;
  overflow: hidden;
}

.forum-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(6, 182, 212, 0.1), transparent);
  animation: shimmer 3s infinite;
}

@keyframes shimmer {
  0% { left: -100%; }
  100% { left: 100%; }
}

.header-content h1 {
  margin-bottom: var(--spacing-sm);
  background: linear-gradient(135deg, var(--accent), var(--accent-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-size: 2.75rem;
  letter-spacing: -0.5px;
}

.forum-subtitle {
  color: var(--text-secondary);
  margin: 0;
  font-size: 1.1rem;
}

.forum-stats {
  display: flex;
  gap: var(--spacing-xl);
}

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

.stat-number {
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: var(--spacing-xs);
}

@media (max-width: 768px) {
  .forum-header {
    flex-direction: column;
    gap: var(--spacing-lg);
    text-align: center;
  }
  
  .forum-stats {
    gap: var(--spacing-lg);
  }
}

/* ================================
   Categories
   ================================ */
.forum-categories {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: var(--spacing-xl);
}

@media (max-width: 1024px) {
  .forum-categories {
    grid-template-columns: 1fr;
  }
}

.category-section {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  overflow: hidden;
  margin-bottom: var(--spacing-xl);
  transition: var(--transition-slow);
  position: relative;
}

.category-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-light));
  opacity: 0;
  transition: var(--transition);
}

.category-section:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
  border-color: var(--accent-glow);
}

.category-section:hover::before {
  opacity: 1;
}

.category-header {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: var(--spacing-xl);
  padding: var(--spacing-xl);
  border-left: 4px solid var(--accent);
  align-items: center;
  background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
}

.category-info h2 {
  margin: 0;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.category-info a {
  color: var(--text-primary);
  font-weight: 600;
}

.category-info a:hover {
  color: var(--accent);
}

.category-description {
  margin: var(--spacing-sm) 0 0 0;
  font-size: 0.9rem;
}

.category-stats {
  display: flex;
  gap: var(--spacing-lg);
}

.stat {
  text-align: center;
}

.stat .stat-number {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--accent);
}

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

.category-latest {
  text-align: right;
  min-width: 200px;
}

.latest-title {
  color: var(--text-primary);
  font-weight: 500;
  display: block;
  margin-bottom: var(--spacing-xs);
}

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

.latest-user {
  color: var(--accent);
  font-weight: 500;
}

.latest-empty {
  color: var(--text-muted);
  font-style: italic;
}

/* Subcategories */
.subcategories {
  background: var(--bg-tertiary);
  border-top: 1px solid var(--border-color);
}

.subcategory {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: var(--spacing-lg);
  padding: var(--spacing-lg) var(--spacing-xl);
  border-bottom: 1px solid var(--border-color);
  align-items: center;
}

.subcategory:last-child {
  border-bottom: none;
}

.subcategory-info h3 {
  margin: 0;
  font-size: 1rem;
}

.subcategory-info a {
  color: var(--text-secondary);
}

.subcategory-info a:hover {
  color: var(--accent);
}

.subcategory-description {
  margin: var(--spacing-xs) 0 0 0;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.subcategory-stats {
  display: flex;
  gap: var(--spacing-md);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.subcategory-latest {
  text-align: right;
  font-size: 0.85rem;
}

.subcategory-latest a {
  color: var(--text-secondary);
  display: block;
  margin-bottom: var(--spacing-xs);
}

/* ================================
   Sidebar
   ================================ */
.forum-sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.sidebar-widget {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.widget-title {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin: 0;
  padding: var(--spacing-lg);
  background: var(--bg-tertiary);
  border-bottom: 1px solid var(--border-color);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
}

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

/* Online Users */
.online-users {
  padding: var(--spacing-lg);
}

.online-user {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) 0;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
}

.online-user:last-child {
  border-bottom: none;
}

.online-user:hover {
  color: var(--accent);
}

.user-role {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.user-role.role-1,
.user-role.role-2 { background: var(--error); } /* Admin */
.user-role.role-3 { background: var(--warning); } /* Moderator */
.user-role.role-4 { background: var(--info); } /* Trusted */
.user-role.role-5 { background: var(--text-muted); } /* User */

.online-more {
  margin-top: var(--spacing-sm);
  font-size: 0.85rem;
  color: var(--text-muted);
  text-align: center;
}

/* Recent Topics */
.recent-topics {
  padding: var(--spacing-lg);
}

.recent-topic {
  padding: var(--spacing-sm) 0;
  border-bottom: 1px solid var(--border-color);
}

.recent-topic:last-child {
  border-bottom: none;
}

.topic-title {
  color: var(--text-secondary);
  font-weight: 500;
  display: block;
  margin-bottom: var(--spacing-xs);
}

.topic-title:hover {
  color: var(--accent);
}

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

.topic-meta a {
  color: var(--accent);
}

.topic-time {
  margin-left: var(--spacing-sm);
}

/* Forum Stats Detail */
.forum-stats-detail {
  padding: var(--spacing-lg);
}

.stat-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-sm) 0;
  border-bottom: 1px solid var(--border-color);
}

.stat-row:last-child {
  border-bottom: none;
}

.stat-label {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.stat-value {
  color: var(--text-primary);
  font-weight: 500;
}

.stat-value a {
  color: var(--accent);
}

/* ================================
   Footer
   ================================ */
.footer {
  background: linear-gradient(to bottom, var(--bg-primary), var(--bg-secondary));
  border-top: 2px solid var(--accent);
  margin-top: var(--spacing-2xl);
  padding: var(--spacing-2xl) 0 var(--spacing-xl) 0;
  position: relative;
  overflow: hidden;
}

.footer::before {
  content: '';
  position: absolute;
  top: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-light), var(--accent));
  background-size: 200% 100%;
  animation: gradientShift 3s ease infinite;
}

.footer-content {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: var(--spacing-2xl);
  align-items: center;
  padding: 0 var(--spacing-xl);
  color: var(--text-secondary);
}

.footer-left {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.footer-brand {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: var(--spacing-xs);
}

.footer-tagline {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.footer-center {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-md);
}

.footer-social {
  display: flex;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  color: var(--text-secondary);
  font-size: 1.3rem;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.social-link::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--accent-glow), transparent);
  opacity: 0;
  transition: var(--transition);
}

.social-link:hover {
  transform: translateY(-3px);
  border-color: var(--accent);
  box-shadow: 0 6px 20px var(--accent-glow);
}

.social-link:hover::before {
  opacity: 1;
}

.social-link i {
  position: relative;
  z-index: 1;
}

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

.footer-right {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: var(--spacing-sm);
}

.footer-links {
  display: flex;
  gap: var(--spacing-lg);
  flex-wrap: wrap;
  justify-content: flex-end;
}

.footer-link {
  color: var(--text-secondary);
  font-size: 0.9rem;
  transition: var(--transition);
  position: relative;
  padding-bottom: 2px;
}

.footer-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: var(--transition);
}

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

.footer-link:hover::after {
  width: 100%;
}

.footer-stats {
  display: flex;
  gap: var(--spacing-md);
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-stats span {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

@keyframes gradientShift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

@media (max-width: 992px) {
  .footer-content {
    grid-template-columns: 1fr;
    text-align: center;
    gap: var(--spacing-xl);
  }
  
  .footer-left,
  .footer-right {
    align-items: center;
  }
  
  .footer-links {
    justify-content: center;
  }
}

/* ================================
   Responsive Design
   ================================ */
@media (max-width: 768px) {
  .category-header {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
    text-align: center;
  }
  
  .category-stats {
    justify-content: center;
  }
  
  .category-latest {
    text-align: center;
  }
  
  .subcategory {
    grid-template-columns: 1fr;
    gap: var(--spacing-sm);
    text-align: center;
  }
  
  .navbar-menu {
    flex-direction: column;
    gap: var(--spacing-md);
  }
  
  .navbar-nav {
    gap: var(--spacing-md);
  }
}

/* ================================
   Animations
   ================================ */
@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

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

.fade-in {
  animation: fadeIn 0.3s ease-out;
}

/* ================================
   Icons (Basic icon classes)
   ================================ */
[class^="icon-"] {
  display: inline-block;
  width: 1em;
  height: 1em;
  vertical-align: -0.125em;
}

/* You would replace these with actual icon font or SVG icons */
.icon-home::before { content: "🏠"; }
.icon-search::before { content: "🔍"; }
.icon-settings::before { content: "⚙️"; }
.icon-user::before { content: "👤"; }
.icon-users::before { content: "👥"; }
.icon-eye::before { content: "👁️"; }
.icon-log-out::before { content: "🚪"; }
.icon-chevron-down::before { content: "▼"; }
.icon-x::before { content: "✕"; }
.icon-check-circle::before { content: "✅"; }
.icon-alert-circle::before { content: "⚠️"; }
.icon-clock::before { content: "🕐"; }
.icon-bar-chart::before { content: "📊"; }




/* ================================
   Authentication Pages - Modern Design
   ================================ */
.main-content {
  min-height: calc(100vh - 200px);
  display: flex;
  align-items: center;
  padding: var(--spacing-2xl) 0;
  position: relative;
  overflow: hidden;
}

/* Animated background */
.main-content::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at center, 
    rgba(6, 182, 212, 0.03) 0%, 
    transparent 50%);
  animation: pulse 15s ease-in-out infinite;
  pointer-events: none;
}

@keyframes pulse {
  0%, 100% { transform: scale(1) rotate(0deg); opacity: 0.3; }
  50% { transform: scale(1.1) rotate(180deg); opacity: 0.6; }
}

.auth-container {
  display: grid;
  grid-template-columns: 500px 1fr;
  gap: var(--spacing-2xl);
  max-width: 1100px;
  margin: 0 auto;
  align-items: center;
  position: relative;
  z-index: 1;
}

.auth-card {
  background: linear-gradient(145deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
  border: 2px solid transparent;
  background-clip: padding-box;
  border-radius: var(--radius-xl);
  padding: var(--spacing-2xl);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5), 
              0 0 0 1px rgba(6, 182, 212, 0.1);
  position: relative;
  overflow: hidden;
}

.auth-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, 
    var(--accent), 
    var(--accent-light), 
    var(--accent));
  background-size: 200% 100%;
  animation: gradientFlow 3s ease infinite;
}

@keyframes gradientFlow {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

.auth-header {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
  position: relative;
}

.auth-header h1 {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-md);
  background: linear-gradient(135deg, 
    var(--accent) 0%, 
    var(--accent-light) 50%, 
    #22d3ee 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 800;
  letter-spacing: -1px;
  text-shadow: 0 0 30px rgba(6, 182, 212, 0.3);
}

.auth-header p {
  color: var(--text-secondary);
  font-size: 1.1rem;
  margin: 0;
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.form-label {
  font-weight: 700;
  color: var(--text-primary);
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.required {
  color: var(--accent);
  font-size: 1.2rem;
}

.form-input {
  width: 100%;
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--bg-elevated);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  color: var(--text-primary);
  font-size: 1rem;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  font-family: var(--font-family);
}

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

.form-input:hover {
  border-color: var(--border-light);
  background: var(--bg-overlay);
}

.form-input:focus {
  outline: none;
  border-color: var(--accent);
  background: var(--bg-elevated);
  box-shadow: 0 0 0 4px var(--accent-glow), 
              0 4px 20px rgba(6, 182, 212, 0.2);
  transform: translateY(-2px);
}

.form-input.input-error {
  border-color: var(--error);
  animation: shake 0.4s cubic-bezier(.36,.07,.19,.97) both;
}

@keyframes shake {
  10%, 90% { transform: translateX(-2px); }
  20%, 80% { transform: translateX(4px); }
  30%, 50%, 70% { transform: translateX(-6px); }
  40%, 60% { transform: translateX(6px); }
}

.form-error {
  color: var(--error);
  font-size: 0.875rem;
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  animation: slideDown 0.3s ease-out;
}

.form-hint {
  color: var(--text-muted);
  font-size: 0.85rem;
  font-style: italic;
}

.password-input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.password-input-wrapper .form-input {
  padding-right: 3.5rem;
}

.password-toggle {
  position: absolute;
  right: var(--spacing-md);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  cursor: pointer;
  font-size: 1.3rem;
  padding: var(--spacing-sm) var(--spacing-md);
  color: var(--text-muted);
  transition: var(--transition);
}

.password-toggle:hover {
  color: var(--accent);
  background: var(--bg-elevated);
  border-color: var(--accent);
  transform: scale(1.1);
}

.password-strength {
  margin-top: var(--spacing-sm);
}

.strength-bar {
  height: 6px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-sm);
  overflow: hidden;
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.3);
}

.strength-progress {
  height: 100%;
  width: 0;
  transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.strength-progress::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
  background: linear-gradient(90deg, 
    transparent, 
    rgba(255,255,255,0.3), 
    transparent);
  animation: shimmerStrength 2s infinite;
}

@keyframes shimmerStrength {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

.strength-progress.strength-weak {
  background: linear-gradient(90deg, var(--error), #ff8787);
}

.strength-progress.strength-medium {
  background: linear-gradient(90deg, var(--warning), #ffd43b);
}

.strength-progress.strength-strong {
  background: linear-gradient(90deg, var(--success), #51cf66);
}

.strength-text {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-top: var(--spacing-sm);
}

.form-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.form-check {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.form-checkbox {
  width: 20px;
  height: 20px;
  accent-color: var(--accent);
  cursor: pointer;
  border-radius: var(--radius-sm);
}

.form-check-label {
  color: var(--text-secondary);
  font-size: 0.95rem;
  cursor: pointer;
  user-select: none;
  transition: var(--transition);
}

.form-check-label:hover {
  color: var(--text-primary);
}

.form-check-label a {
  color: var(--accent);
  text-decoration: underline;
}

.form-link {
  color: var(--accent);
  font-size: 0.95rem;
  text-decoration: none;
  transition: var(--transition);
  font-weight: 600;
}

.form-link:hover {
  color: var(--accent-light);
  text-decoration: underline;
}

.btn-block {
  width: 100%;
  justify-content: center;
  font-size: 1.1rem;
  font-weight: 700;
  padding: var(--spacing-lg) var(--spacing-xl);
  margin-top: var(--spacing-lg);
  background: linear-gradient(135deg, var(--accent), var(--accent-hover));
  border: none;
  box-shadow: 0 4px 15px var(--accent-glow),
              0 8px 30px rgba(6, 182, 212, 0.3);
  position: relative;
  overflow: hidden;
}

.btn-block::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, 
    transparent, 
    rgba(255,255,255,0.3), 
    transparent);
  transition: var(--transition-slow);
}

.btn-block:hover::before {
  left: 100%;
}

.btn-block:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 25px var(--accent-glow),
              0 12px 40px rgba(6, 182, 212, 0.4);
}

.btn-block:active {
  transform: translateY(-1px);
}

.auth-footer {
  text-align: center;
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-xl);
  border-top: 1px solid var(--border-color);
}

.auth-footer p {
  color: var(--text-secondary);
  margin: 0;
  font-size: 1rem;
}

.auth-link {
  color: var(--accent);
  font-weight: 700;
  text-decoration: none;
  transition: var(--transition);
  position: relative;
}

.auth-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: var(--transition);
}

.auth-link:hover::after {
  width: 100%;
}

.auth-link:hover {
  color: var(--accent-light);
}

/* Auth Features Sidebar */
.auth-features {
  background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-elevated) 100%);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--spacing-2xl);
  position: relative;
  overflow: hidden;
}

.auth-features::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle, 
    rgba(6, 182, 212, 0.1) 0%, 
    transparent 70%);
  animation: float 20s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  33% { transform: translate(30px, -30px) rotate(120deg); }
  66% { transform: translate(-20px, 20px) rotate(240deg); }
}

.auth-features h3 {
  text-align: center;
  margin-bottom: var(--spacing-xl);
  color: var(--accent);
  font-size: 1.75rem;
  font-weight: 800;
  position: relative;
  z-index: 1;
}

.feature-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
  position: relative;
  z-index: 1;
}

.feature-item {
  display: flex;
  gap: var(--spacing-md);
  align-items: start;
  padding: var(--spacing-lg);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.feature-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, 
    transparent, 
    rgba(6, 182, 212, 0.1), 
    transparent);
  transition: var(--transition-slow);
}

.feature-item:hover::before {
  left: 100%;
}

.feature-item:hover {
  transform: translateX(8px);
  background: var(--bg-elevated);
  border-color: var(--accent-glow);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.feature-icon {
  font-size: 2.5rem;
  flex-shrink: 0;
  filter: drop-shadow(0 2px 4px rgba(0,0,0,0.3));
}

.feature-item h4 {
  margin: 0 0 var(--spacing-xs) 0;
  color: var(--text-primary);
  font-size: 1.1rem;
  font-weight: 700;
}

.feature-item p {
  margin: 0;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.5;
}

/* Alerts */
.alert {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  margin-bottom: var(--spacing-xl);
  animation: slideDown 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  font-weight: 600;
  border: 2px solid;
}

.alert-error {
  background: linear-gradient(135deg, 
    rgba(255, 107, 107, 0.15), 
    rgba(255, 107, 107, 0.05));
  border-color: var(--error);
  color: #ff6b6b;
  box-shadow: 0 4px 15px rgba(255, 107, 107, 0.2);
}

.alert-success {
  background: linear-gradient(135deg, 
    rgba(81, 207, 102, 0.15), 
    rgba(81, 207, 102, 0.05));
  border-color: var(--success);
  color: #51cf66;
  box-shadow: 0 4px 15px rgba(81, 207, 102, 0.2);
}

.alert-info {
  background: linear-gradient(135deg, 
    rgba(116, 192, 252, 0.15), 
    rgba(116, 192, 252, 0.05));
  border-color: var(--info);
  color: #74c0fc;
  box-shadow: 0 4px 15px rgba(116, 192, 252, 0.2);
}

/* Responsive */
@media (max-width: 992px) {
  .auth-container {
    grid-template-columns: 1fr;
    max-width: 550px;
  }
  
  .auth-features {
    order: 2;
  }
}

@media (max-width: 576px) {
  .auth-card {
    padding: var(--spacing-xl);
  }
  
  .auth-header h1 {
    font-size: 2rem;
  }
  
  .form-row {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .feature-item {
    padding: var(--spacing-md);
  }
}

/* Loading Animation */
.btn-block.loading {
  pointer-events: none;
  opacity: 0.7;
}

.btn-block.loading::after {
  content: '';
  position: absolute;
  width: 20px;
  height: 20px;
  top: 50%;
  left: 50%;
  margin-left: -10px;
  margin-top: -10px;
  border: 2px solid white;
  border-radius: 50%;
  border-top-color: transparent;
  animation: spin 0.6s linear infinite;
}

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