/* ====================================
   TradIA Exchange - Authentication CSS
   Login, Register & Welcome Pages
   ==================================== */

/* ====================================
   WELCOME/LANDING PAGE STYLES
   ==================================== */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  transition: all var(--transition-normal);
}

[data-theme="dark"] .navbar {
  background: rgba(11, 14, 17, 0.95);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-md) var(--space-xl);
}

.nav-brand {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.nav-brand h1 {
  font-size: var(--font-size-xl);
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin: 0;
}

.brand-subtitle {
  display: none;
}

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

.nav-link {
  color: var(--secondary-text);
  font-weight: 500;
  font-size: var(--font-size-xs);
  transition: color var(--transition-fast);
}

.nav-link:hover {
  color: var(--brand-primary);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  cursor: pointer;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--primary-text);
  transition: all var(--transition-fast);
}

/* Hero Section */
.hero {
  padding: 120px 0 80px;
  background: linear-gradient(135deg, var(--primary-bg) 0%, var(--secondary-bg) 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="%23f0b90b" stroke-width="0.5" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
  z-index: 0;
}

.hero-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4xl);
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-xl);
  position: relative;
  z-index: 1;
}

.hero-content {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.hero-title {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--space-xl);
}

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

.hero-subtitle {
  font-size: var(--font-size-lg);
  color: var(--secondary-text);
  margin-bottom: var(--space-2xl);
  line-height: 1.6;
}

.hero-buttons {
  display: flex;
  gap: var(--space-lg);
  margin-bottom: var(--space-3xl);
}

.hero-stats {
  display: flex;
  gap: var(--space-2xl);
}

.stat {
  text-align: center;
}

.stat-number {
  display: block;
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--brand-primary);
  font-family: var(--font-mono);
}

.stat-label {
  font-size: var(--font-size-sm);
  color: var(--muted-text);
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* Trading Card Demo */
.trading-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  box-shadow: var(--card-hover-shadow);
  backdrop-filter: blur(10px);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-lg);
}

.exchange-badge {
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--brand-primary);
  background: var(--buy-green-bg);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.price-display {
  margin-bottom: var(--space-xl);
}

.price-display .symbol {
  display: block;
  font-size: var(--font-size-sm);
  color: var(--muted-text);
  margin-bottom: var(--space-xs);
}

.price-display .price {
  display: block;
  font-size: var(--font-size-3xl);
  font-weight: 700;
  font-family: var(--font-mono);
  margin-bottom: var(--space-xs);
}

.price-display .change {
  font-size: var(--font-size-lg);
  font-weight: 600;
}

.indicators {
  display: flex;
  gap: var(--space-lg);
  margin-bottom: var(--space-xl);
}

.indicator {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.indicator span:first-child {
  font-size: var(--font-size-xs);
  color: var(--muted-text);
  text-transform: uppercase;
}

.indicator .value {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--primary-text);
}

.arbitrage-alert {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md);
  background: var(--buy-green-bg);
  border: 1px solid var(--buy-green);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  color: var(--buy-green);
  font-weight: 500;
}

.alert-icon {
  font-size: var(--font-size-lg);
}

/* ====================================
   AUTHENTICATION PAGES
   ==================================== */

.auth-body {
  min-height: 100vh;
  background: var(--primary-bg);
  position: relative;
  overflow-x: hidden;
}

/* Exchange Theme Specific */
.exchange-theme {
  background: linear-gradient(135deg, var(--primary-bg) 0%, var(--secondary-bg) 100%);
}

/* Crypto Grid Background */
.crypto-grid-bg {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 0;
  opacity: 0.1;
}

.grid-line {
  position: absolute;
  background: var(--brand-primary);
}

.grid-line.horizontal {
  height: 1px;
  left: 0;
  right: 0;
}

.grid-line.horizontal:nth-child(1) { top: 20%; }
.grid-line.horizontal:nth-child(2) { top: 50%; }
.grid-line.horizontal:nth-child(3) { top: 80%; }

.grid-line.vertical {
  width: 1px;
  top: 0;
  bottom: 0;
}

.grid-line.vertical:nth-child(4) { left: 25%; }
.grid-line.vertical:nth-child(5) { left: 50%; }
.grid-line.vertical:nth-child(6) { left: 75%; }

/* Floating Elements Animation */
.auth-background {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 0;
  overflow: hidden;
}

.floating-elements {
  position: relative;
  width: 100%;
  height: 100%;
}

.floating-elements .element {
  position: absolute;
  background: var(--brand-primary);
  border-radius: 50%;
  opacity: 0.1;
  animation: float 20s infinite linear;
}

.floating-elements .element:nth-child(1) {
  width: 60px;
  height: 60px;
  left: 10%;
  animation-delay: 0s;
}

.floating-elements .element:nth-child(2) {
  width: 40px;
  height: 40px;
  left: 30%;
  animation-delay: 4s;
}

.floating-elements .element:nth-child(3) {
  width: 80px;
  height: 80px;
  left: 50%;
  animation-delay: 8s;
}

.floating-elements .element:nth-child(4) {
  width: 30px;
  height: 30px;
  left: 70%;
  animation-delay: 12s;
}

.floating-elements .element:nth-child(5) {
  width: 50px;
  height: 50px;
  left: 90%;
  animation-delay: 16s;
}

@keyframes float {
  0% {
    transform: translateY(100vh) rotate(0deg);
  }
  100% {
    transform: translateY(-100px) rotate(360deg);
  }
}

/* Exchange Navigation */
.exchange-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
}

[data-theme="dark"] .exchange-nav {
  background: rgba(11, 14, 17, 0.95);
}

.exchange-nav .nav-brand {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.brand-icon {
  width: 40px;
  height: 40px;
  background: var(--gradient-primary);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: #1e1e1e;
}

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

/* Auth Container */
.auth-container {
  min-height: 100vh;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 70px var(--space-xl) var(--space-xl);
  position: relative;
  z-index: 1;
}

.exchange-container {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1fr 1fr;
  position: relative;
  z-index: 1;
}

.auth-panel {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 120px var(--space-xl) var(--space-xl);
}

.trading-panel {
  background: var(--secondary-bg);
  border-left: 1px solid var(--border-color);
  padding: 120px var(--space-xl) var(--space-xl);
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Auth Card */
.auth-card {
  width: 100%;
  max-width: 450px;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  box-shadow: var(--card-hover-shadow);
  backdrop-filter: blur(10px);
}

.exchange-card {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
}

[data-theme="dark"] .exchange-card {
  background: rgba(30, 35, 41, 0.95);
}

.auth-header {
  text-align: center;
  margin-bottom: var(--space-xl);
}

.auth-header h1 {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  margin-bottom: var(--space-sm);
}

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

/* Form Styles */
.auth-form {
  margin-bottom: var(--space-md);
}

.form-group {
  margin-bottom: var(--space-md);
}

.form-group label {
  display: block;
  margin-bottom: var(--space-sm);
  font-weight: 500;
  color: var(--primary-text);
}

.form-group input,
.form-group select {
  width: 100%;
  padding: var(--space-lg);
  font-size: var(--font-size-base);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  background: var(--card-bg);
  color: var(--primary-text);
  transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--brand-primary);
  box-shadow: 0 0 0 3px rgba(240, 185, 11, 0.1);
}

/* Password Input */
.password-input {
  position: relative;
}

.password-toggle {
  position: absolute;
  right: var(--space-lg);
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  cursor: pointer;
  color: var(--muted-text);
  transition: color var(--transition-fast);
}

.password-toggle:hover {
  color: var(--primary-text);
}

/* Phone Input */
.phone-input {
  display: flex;
  gap: var(--space-sm);
}

.phone-input select {
  width: 120px;
  flex-shrink: 0;
}

.phone-input input {
  flex: 1;
}

/* Password Strength */
.password-strength {
  margin-top: var(--space-sm);
}

.strength-bar {
  height: 4px;
  background: var(--border-color);
  border-radius: 2px;
  overflow: hidden;
  margin-bottom: var(--space-xs);
}

.strength-fill {
  height: 100%;
  transition: all var(--transition-normal);
  border-radius: 2px;
}

.strength-fill.weak {
  width: 25%;
  background: var(--sell-red);
}

.strength-fill.fair {
  width: 50%;
  background: var(--warning-yellow);
}

.strength-fill.good {
  width: 75%;
  background: var(--neutral-blue);
}

.strength-fill.strong {
  width: 100%;
  background: var(--buy-green);
}

.strength-text {
  font-size: var(--font-size-sm);
  color: var(--muted-text);
}

/* Form Options */
.form-options {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-md);
}

.checkbox-container {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  cursor: pointer;
  user-select: none;
}

.checkbox-container input[type="checkbox"] {
  width: auto;
  margin: 0;
}

.checkmark {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border-color);
  border-radius: var(--radius-sm);
  position: relative;
  transition: all var(--transition-fast);
}

.checkbox-container input[type="checkbox"]:checked + .checkmark {
  background: var(--brand-primary);
  border-color: var(--brand-primary);
}

.checkbox-container input[type="checkbox"]:checked + .checkmark::after {
  content: '✓';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: #1e1e1e;
  font-weight: 700;
  font-size: var(--font-size-sm);
}

.forgot-link {
  font-size: var(--font-size-sm);
  color: var(--brand-primary);
  text-decoration: none;
}

.forgot-link:hover {
  text-decoration: underline;
}

/* Form Divider */
.form-divider {
  position: relative;
  text-align: center;
  margin: var(--space-md) 0;
}

.form-divider::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--border-color);
}

.form-divider span {
  background: var(--card-bg);
  padding: 0 var(--space-lg);
  color: var(--muted-text);
  font-size: var(--font-size-sm);
}

/* Social Login */
.social-login {
  display: flex;
  gap: var(--space-md);
}

.btn-social {
  flex: 1;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  color: var(--primary-text);
  padding: var(--space-md);
  border-radius: var(--radius-lg);
  font-weight: 500;
  transition: all var(--transition-fast);
}

.btn-social:hover {
  background: var(--secondary-bg);
  border-color: var(--border-hover);
}

.social-icon {
  width: 20px;
  height: 20px;
}

/* Auth Footer */
.auth-footer {
  text-align: center;
  padding-top: var(--space-md);
  border-top: 1px solid var(--border-color);
}

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

.auth-footer a {
  color: var(--brand-primary);
  font-weight: 500;
}

/* Error Messages */
.error-message {
  display: block;
  margin-top: var(--space-xs);
  font-size: var(--font-size-sm);
  color: var(--sell-red);
}

/* Status Messages */
.status-message {
  position: fixed;
  top: var(--space-xl);
  right: var(--space-xl);
  z-index: 9999;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  box-shadow: var(--card-hover-shadow);
  min-width: 300px;
  transform: translateX(400px);
  transition: transform var(--transition-normal);
}

.status-message.show {
  transform: translateX(0);
}

.status-content {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.status-message.success {
  border-color: var(--buy-green);
}

.status-message.error {
  border-color: var(--sell-red);
}

.status-message.warning {
  border-color: var(--warning-yellow);
}

/* Button Loading State */
.button-spinner {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.spinner {
  width: 16px;
  height: 16px;
  border: 2px solid transparent;
  border-top: 2px solid currentColor;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Demo Credentials */
.demo-credentials {
  position: fixed;
  bottom: var(--space-md);
  left: var(--space-md);
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  box-shadow: var(--card-shadow);
  max-width: 200px;
  z-index: 1000;
  font-size: var(--font-size-xs);
}

.demo-credentials h4 {
  margin: 0 0 var(--space-xs) 0;
  font-size: var(--font-size-xs);
  color: var(--primary-text);
}

.demo-item {
  font-size: 0.65rem;
  color: var(--secondary-text);
  line-height: 1.3;
}

.btn-demo {
  background: var(--neutral-blue);
  color: white;
  border: none;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  font-size: 0.65rem;
  margin-top: var(--space-xs);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-demo:hover {
  background: var(--neutral-blue);
  opacity: 0.8;
}

/* Trading Ticker */
.trading-ticker {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--card-bg);
  border-top: 1px solid var(--border-color);
  padding: var(--space-md) var(--space-xl);
  display: flex;
  gap: var(--space-3xl);
  z-index: 1000;
  overflow-x: auto;
}

.ticker-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  white-space: nowrap;
  font-size: var(--font-size-sm);
}

.ticker-item .symbol {
  font-weight: 600;
  color: var(--muted-text);
}

.ticker-item .price {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--primary-text);
}

.ticker-item .change {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: var(--font-size-xs);
}

/* ====================================
   TRADING PANEL COMPONENTS
   ==================================== */

.trading-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  box-shadow: var(--card-shadow);
}

.trading-card h3 {
  margin-bottom: var(--space-xl);
  color: var(--primary-text);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.trading-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
  margin-bottom: var(--space-2xl);
}

.stat-item {
  text-align: center;
  padding: var(--space-lg);
  background: var(--secondary-bg);
  border-radius: var(--radius-lg);
}

.stat-value {
  display: block;
  font-size: var(--font-size-xl);
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--brand-primary);
  margin-bottom: var(--space-xs);
}

.stat-label {
  font-size: var(--font-size-xs);
  color: var(--muted-text);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.features-list {
  margin-bottom: var(--space-2xl);
}

.feature-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.feature-icon {
  font-size: var(--font-size-xl);
  line-height: 1;
}

.feature-item strong {
  display: block;
  margin-bottom: var(--space-xs);
  color: var(--primary-text);
}

.feature-item p {
  margin: 0;
  font-size: var(--font-size-sm);
  color: var(--secondary-text);
  line-height: 1.4;
}

.market-widget {
  margin-bottom: var(--space-2xl);
}

.market-widget h4 {
  margin-bottom: var(--space-lg);
  color: var(--primary-text);
  font-size: var(--font-size-base);
}

.market-items {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.market-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-md);
  background: var(--secondary-bg);
  border-radius: var(--radius-md);
}

.market-symbol {
  font-weight: 600;
  color: var(--primary-text);
  font-size: var(--font-size-sm);
}

.market-price {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--primary-text);
}

.market-change {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: var(--font-size-sm);
}

.arbitrage-demo {
  background: var(--buy-green-bg);
  border: 1px solid var(--buy-green);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.8; }
}

.alert-header {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
  font-weight: 600;
  color: var(--buy-green);
  font-size: var(--font-size-sm);
}

.alert-content strong {
  display: block;
  margin-bottom: var(--space-xs);
  color: var(--primary-text);
}

.alert-content p {
  margin: 0 0 var(--space-sm) 0;
  font-size: var(--font-size-sm);
  color: var(--secondary-text);
}

.profit-badge {
  background: var(--buy-green);
  color: white;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-xs);
  font-weight: 600;
  font-family: var(--font-mono);
}

/* ====================================
   REFERRAL SYSTEM STYLES
   ==================================== */

.referral-input {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.referral-input input {
  flex: 1;
  padding-right: var(--space-3xl);
}

.referral-info-btn {
  position: absolute;
  right: var(--space-lg);
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  cursor: pointer;
  color: var(--brand-primary);
  transition: all var(--transition-fast);
  padding: var(--space-xs);
  border-radius: var(--radius-sm);
  z-index: 10;
}

.referral-info-btn:hover {
  background: var(--buy-green-bg);
  color: var(--buy-green);
}

.info-icon {
  font-size: var(--font-size-base);
  line-height: 1;
}

.referral-benefits {
  margin-top: var(--space-md);
  background: var(--buy-green-bg);
  border: 1px solid var(--buy-green);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  display: none;
  animation: slideDown 0.3s ease-out;
}

.referral-benefits.show {
  display: block;
}

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

.benefits-content h4 {
  margin: 0 0 var(--space-md) 0;
  color: var(--buy-green);
  font-size: var(--font-size-base);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.benefits-content ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.benefits-content li {
  padding: var(--space-sm) 0;
  color: var(--primary-text);
  font-size: var(--font-size-sm);
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  line-height: 1.5;
}

.benefits-content li::before {
  content: '✅';
  flex-shrink: 0;
  margin-top: 2px;
}

.benefits-content strong {
  color: var(--buy-green);
  font-weight: 600;
}

.success-message {
  display: block;
  margin-top: var(--space-xs);
  font-size: var(--font-size-sm);
  color: var(--buy-green);
  font-weight: 500;
}

/* Referral URL Banner */
.referral-banner {
  background: linear-gradient(135deg, var(--buy-green-bg) 0%, var(--neutral-blue-bg) 100%);
  border: 1px solid var(--buy-green);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  margin-bottom: var(--space-xl);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.referral-banner::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
  animation: shimmer 2s infinite;
}

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

.referral-banner h3 {
  margin: 0 0 var(--space-sm) 0;
  color: var(--buy-green);
  font-size: var(--font-size-lg);
}

.referral-banner p {
  margin: 0;
  color: var(--primary-text);
  font-size: var(--font-size-sm);
}

/* Enhanced Form Styling */
.form-group input[type="text"]:focus,
.form-group input[type="email"]:focus,
.form-group input[type="password"]:focus,
.form-group input[type="tel"]:focus {
  border-color: var(--brand-primary);
  box-shadow: 0 0 0 3px rgba(240, 185, 11, 0.15);
  background: var(--primary-bg);
}

.form-group input.valid {
  border-color: var(--buy-green);
  background: var(--buy-green-bg);
}

.form-group input.invalid {
  border-color: var(--sell-red);
  background: var(--sell-red-bg);
}

/* Enhanced Button States */
.btn-primary {
  position: relative;
  overflow: hidden;
  background: var(--gradient-primary);
  border: none;
  box-shadow: 0 4px 12px rgba(240, 185, 11, 0.3);
  font-weight: 600;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  font-size: var(--font-size-sm);
}

.btn-primary::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.5s;
}

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

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(240, 185, 11, 0.4);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 2px 8px rgba(240, 185, 11, 0.3);
}

.btn-primary:disabled {
  opacity: 0.6;
  transform: none;
  box-shadow: none;
}

/* Enhanced Social Buttons */
.btn-social {
  position: relative;
  background: var(--card-bg);
  border: 2px solid var(--border-color);
  transition: all var(--transition-fast);
  font-weight: 500;
}

.btn-social:hover {
  border-color: var(--brand-primary);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.btn-google:hover {
  border-color: #4285F4;
  background: rgba(66, 133, 244, 0.05);
}

.btn-apple:hover {
  border-color: #000;
  background: rgba(0, 0, 0, 0.05);
}

[data-theme="dark"] .btn-apple:hover {
  border-color: #fff;
  background: rgba(255, 255, 255, 0.05);
}

/* Loading States */
.button-text.hidden {
  opacity: 0;
}

.button-spinner.show {
  display: inline-flex;
}

/* Enhanced Checkbox Styling */
.checkbox-container {
  position: relative;
  padding-left: var(--space-lg);
}

.checkbox-container input[type="checkbox"] {
  position: absolute;
  opacity: 0;
  cursor: pointer;
  width: 0;
  height: 0;
}

.checkmark {
  position: absolute;
  left: 0;
  top: 2px;
  width: 18px;
  height: 18px;
  background: var(--card-bg);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.checkbox-container:hover .checkmark {
  border-color: var(--brand-primary);
}

.checkbox-container input[type="checkbox"]:checked + .checkmark {
  background: var(--brand-primary);
  border-color: var(--brand-primary);
}

.checkbox-container input[type="checkbox"]:checked + .checkmark::after {
  content: '✓';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: #1e1e1e;
  font-weight: 700;
  font-size: 12px;
  line-height: 1;
}

/* Form Validation Indicators */
.form-group {
  position: relative;
}

.validation-icon {
  position: absolute;
  right: var(--space-lg);
  top: 50%;
  transform: translateY(-50%);
  font-size: var(--font-size-base);
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.form-group.valid .validation-icon.success {
  opacity: 1;
  color: var(--buy-green);
}

.form-group.invalid .validation-icon.error {
  opacity: 1;
  color: var(--sell-red);
}

/* Enhanced Mobile Responsiveness */
@media (max-width: 640px) {
  .referral-benefits {
    padding: var(--space-md);
  }

  .benefits-content li {
    font-size: var(--font-size-xs);
    padding: var(--space-xs) 0;
  }

  .referral-input {
    flex-direction: column;
    align-items: stretch;
  }

  .referral-info-btn {
    position: static;
    transform: none;
    align-self: flex-start;
    margin-top: var(--space-sm);
  }

  .referral-input input {
    padding-right: var(--space-lg);
  }
}

/* ====================================
   RESPONSIVE DESIGN
   ==================================== */

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

  .trading-panel {
    border-left: none;
    border-top: 1px solid var(--border-color);
  }

  .hero-container {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .nav-menu {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }
}

@media (max-width: 768px) {
  .auth-container {
    padding: 50px var(--space-lg) var(--space-lg);
  }

  .auth-panel,
  .trading-panel {
    padding: 60px var(--space-lg) var(--space-lg);
  }

  .auth-card {
    padding: var(--space-lg);
  }

  .hero-buttons {
    flex-direction: column;
  }

  .hero-stats {
    justify-content: center;
  }

  .trading-stats {
    grid-template-columns: 1fr;
  }

  .social-login {
    flex-direction: column;
  }

  .demo-credentials {
    display: none;
  }

  .trading-ticker {
    display: none;
  }
}

@media (max-width: 480px) {
  .auth-container {
    padding: 40px var(--space-md) var(--space-md);
  }

  .auth-card {
    padding: var(--space-md);
    border-radius: var(--radius-lg);
  }

  .form-group input,
  .form-group select {
    padding: var(--space-md);
  }

  .phone-input {
    flex-direction: column;
  }

  .phone-input select {
    width: 100%;
  }

  .hero {
    padding: 100px 0 60px;
  }

  .hero-title {
    font-size: var(--font-size-3xl);
  }
}