/* ========================================
   BASE RESET & VARIABLES
   ======================================== */
:root {
  /* Brand Colors */
  --primary-orange: #FA9A4B;
  --soft-orange: #E0A46A;
  --light-blue: #8FD5EC;
  --sky-blue: #78C0E9;
  --warm-beige: #F2EAD3;
  --white: #FFFFFF;
  --off-white: #F9F9F9;
  --light-gray: #F0F0F0;
  --medium-gray: #E0E0E0;
  --dark-gray: #666666;
  --text-dark: #333333;
  --text-light: #777777;
  --error-red: #E74C3C;
  --success-green: #2ECC71;
  --warning-yellow: #F39C12;
  
  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.16);
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 350ms ease;
  
  /* Border Radius */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 30px;
  --radius-full: 999px;
  
  /* Spacing */
  --space-xs: 0.25rem;  /* 4px */
  --space-sm: 0.375rem; /* 6px */
  --space-md: 0.75rem;  /* 12px */
  --space-lg: 1rem;     /* 16px */
  --space-xl: 1.5rem;   /* 24px */
  --space-2xl: 2rem;    /* 32px */
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  background-color: var(--off-white);
  color: var(--text-dark);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ========================================
   COMPACT AUTH LAYOUT
   ======================================== */
.compact-auth-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-md);
  background: linear-gradient(135deg, var(--warm-beige) 0%, var(--white) 100%);
}

.compact-auth-container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
}

.compact-auth-card {
  display: flex;
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  min-height: 640px;
  max-height: 90vh;
  transition: all var(--transition-normal);
}

/* Panel 1: Branding & Welcome */
.auth-header {
  flex: 0 0 45%;
  background: linear-gradient(135deg, var(--light-blue) 0%, var(--sky-blue) 100%);
  color: var(--white);
  padding: var(--space-2xl) var(--space-xl);
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.auth-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle at 20% 80%, rgba(255, 255, 255, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
}

.auth-header > * {
  position: relative;
  z-index: 1;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-2xl);
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: var(--white);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--sky-blue);
  font-weight: 800;
  font-size: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.brand-name {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--white);
}

.auth-header h1 {
  font-size: 2.25rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: var(--space-md);
  color: var(--white);
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.auth-subtitle {
  font-size: 1.1rem;
  opacity: 0.95;
  max-width: 90%;
  line-height: 1.6;
  margin-bottom: var(--space-2xl);
}

.brand-features {
  list-style: none;
  margin-top: auto;
  padding-top: var(--space-xl);
  border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.brand-features li {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
  font-size: 0.95rem;
}

.brand-features i {
  width: 24px;
  height: 24px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
}

/* Panel 2: Form */
.auth-form-wrapper {
  flex: 0 0 55%;
  padding: var(--space-xl);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  max-height: 90vh;
}

.auth-form-wrapper::-webkit-scrollbar {
  width: 6px;
}

.auth-form-wrapper::-webkit-scrollbar-track {
  background: var(--light-gray);
  border-radius: var(--radius-full);
}

.auth-form-wrapper::-webkit-scrollbar-thumb {
  background: var(--medium-gray);
  border-radius: var(--radius-full);
}

/* Alerts */
.compact-alert {
  padding: var(--space-md);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-lg);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.95rem;
  animation: slideDown 0.3s ease;
}

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

.alert-error {
  background-color: rgba(231, 76, 60, 0.1);
  color: var(--error-red);
  border: 1px solid rgba(231, 76, 60, 0.2);
}

.alert-info {
  background-color: rgba(46, 204, 113, 0.1);
  color: var(--success-green);
  border: 1px solid rgba(46, 204, 113, 0.2);
}

/* Form Styles */
.compact-auth-form {
  flex: 1;
}

.compact-form-row {
  display: flex;
  gap: var(--space-sm);
  margin-bottom: var(--space-sm);
}

.compact-input-group {
  position: relative;
  margin-bottom: var(--space-sm);
  flex: 1;
}

.compact-input-group:last-child {
  margin-bottom: 0;
}

.compact-input-group input,
.compact-input-group select {
  width: 100%;
  height: 48px;
  padding: var(--space-sm) var(--space-md) var(--space-xs);
  font-size: 0.95rem;
  background: var(--off-white);
  border: 2px solid var(--medium-gray);
  border-radius: var(--radius-md);
  color: var(--text-dark);
  transition: all var(--transition-fast);
  outline: none;
}

.compact-input-group input:focus,
.compact-input-group select:focus {
  border-color: var(--primary-orange);
  background: var(--white);
  box-shadow: 0 0 0 3px rgba(250, 154, 75, 0.1);
}

.compact-input-group.filled input,
.compact-input-group.filled select {
  border-color: var(--light-blue);
}

.compact-input-group.error input,
.compact-input-group.error select {
  border-color: var(--error-red);
}

.compact-input-group label {
  position: absolute;
  top: 50%;
  left: var(--space-md);
  transform: translateY(-50%);
  color: var(--text-light);
  font-size: 1rem;
  pointer-events: none;
  transition: all var(--transition-fast);
  background: transparent;
  padding: 0 var(--space-xs);
}

.compact-input-group.focused label,
.compact-input-group.filled label {
  top: var(--space-sm);
  font-size: 0.8rem;
  color: var(--primary-orange);
  transform: translateY(0);
}

.compact-input-group select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23666' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-md) center;
  padding-right: var(--space-2xl);
}

.required {
  color: var(--error-red);
}

/* Password Group */
.password-group {
  position: relative;
}

.password-wrapper {
  position: relative;
}

.toggle-password {
  position: absolute;
  right: var(--space-md);
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--dark-gray);
  cursor: pointer;
  padding: var(--space-xs);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.toggle-password:hover {
  color: var(--primary-orange);
  background: rgba(250, 154, 75, 0.1);
}

.form-hint {
  display: block;
  font-size: 0.8rem;
  color: var(--text-light);
  margin-top: var(--space-xs);
}

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

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

.strength-fill {
  height: 100%;
  width: 0%;
  border-radius: var(--radius-full);
  transition: all var(--transition-normal);
}

.strength-text {
  font-size: 0.8rem;
  font-weight: 500;
}

/* Checkbox Group */
.checkbox-group {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  margin: var(--space-md) 0 var(--space-sm);
  padding: var(--space-sm);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.checkbox-group.error {
  background: rgba(231, 76, 60, 0.05);
  border: 1px solid rgba(231, 76, 60, 0.2);
}

.checkbox-group input[type="checkbox"] {
  width: 18px;
  height: 18px;
  margin-top: 2px;
  accent-color: var(--primary-orange);
}

.checkbox-group label {
  font-size: 0.95rem;
  color: var(--text-dark);
  line-height: 1.4;
}

.checkbox-group label a {
  color: var(--primary-orange);
  text-decoration: none;
  font-weight: 500;
  transition: all var(--transition-fast);
}

.checkbox-group label a:hover {
  color: var(--soft-orange);
  text-decoration: underline;
}

/* Error Messages */
.form-error,
.checkbox-error {
  display: block;
  font-size: 0.8rem;
  color: var(--error-red);
  margin-top: var(--space-xs);
  height: 0;
  opacity: 0;
  transition: all var(--transition-fast);
}

.form-error.show,
.checkbox-error.show {
  height: auto;
  opacity: 1;
  margin-top: var(--space-xs);
}

/* Submit Button */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-md) var(--space-xl);
  font-size: 1rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  gap: var(--space-sm);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-orange) 0%, var(--soft-orange) 100%);
  color: var(--white);
  box-shadow: 0 4px 12px rgba(250, 154, 75, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(250, 154, 75, 0.4);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.btn-full {
  width: 100%;
  margin-top: var(--space-md);
}

.oauth-divider {
  margin: var(--space-md) 0;
  text-align: center;
  position: relative;
  color: var(--text-light);
  font-size: 0.85rem;
}

.oauth-divider::before {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  border-top: 1px solid var(--light-gray);
  z-index: 0;
}

.oauth-divider span {
  position: relative;
  z-index: 1;
  background: var(--white);
  padding: 0 var(--space-sm);
}

.btn-google {
  background: var(--white);
  color: var(--text-dark);
  border: 2px solid var(--medium-gray);
  box-shadow: none;
  margin-top: 0;
}

.btn-google:hover {
  background: var(--off-white);
  border-color: #c1c7d0;
  transform: translateY(-1px);
}

.btn-loader {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.spin {
  animation: spin 1s linear infinite;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* Social Login */
.social-login {
  margin: var(--space-lg) 0;
  padding-top: var(--space-lg);
  border-top: 1px solid var(--light-gray);
}

.social-login h3 {
  text-align: center;
  font-size: 0.9rem;
  color: var(--text-light);
  margin-bottom: var(--space-md);
}

.social-login h3::before,
.social-login h3::after {
  content: '';
  position: absolute;
  top: 50%;
  width: 30%;
  height: 1px;
  background: var(--light-gray);
}

.social-login h3::before {
  left: 0;
}

.social-login h3::after {
  right: 0;
}

.social-buttons {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xs);
}

.social-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  padding: var(--space-md);
  background: var(--off-white);
  border: 1px solid var(--medium-gray);
  border-radius: var(--radius-md);
  color: var(--text-dark);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: not-allowed;
  opacity: 0.6;
  transition: all var(--transition-fast);
}

.social-btn:hover {
  background: var(--light-gray);
  transform: translateY(-1px);
}

.social-btn i {
  font-size: 1.2rem;
  margin-bottom: var(--space-xs);
}

.social-btn.google {
  color: #DB4437;
}

.social-btn.facebook {
  color: #4267B2;
}

.social-btn.apple {
  color: #000000;
}

/* Auth Switch */
.auth-switch {
  text-align: center;
  margin-top: var(--space-lg);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--light-gray);
  color: var(--text-light);
  font-size: 0.95rem;
}

.auth-switch a {
  color: var(--primary-orange);
  font-weight: 600;
  text-decoration: none;
  transition: all var(--transition-fast);
}

.auth-switch a:hover {
  color: var(--soft-orange);
  text-decoration: underline;
}

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

/* Tablet (768px - 1023px) */
@media (max-width: 1023px) {
  .compact-auth-card {
    min-height: 600px;
  }
  
  .auth-header {
    flex: 0 0 35%;
  }
  
  .auth-form-wrapper {
    flex: 0 0 65%;
    padding: var(--space-lg);
  }
  
  .brand-logo {
    margin-bottom: var(--space-xl);
  }
  
  .auth-header h1 {
    font-size: 2rem;
  }
}

/* Mobile (0px - 767px) */
@media (max-width: 767px) {
  .compact-auth-page {
    padding: var(--space-sm);
    align-items: flex-start;
    min-height: 100vh;
    height: auto;
  }
  
  .compact-auth-container {
    height: auto;
  }
  
  .compact-auth-card {
    flex-direction: column;
    min-height: auto;
    max-height: none;
    border-radius: var(--radius-md);
    margin: var(--space-sm) 0;
  }
  
  .auth-header {
    flex: 0 0 auto;
    padding: var(--space-xl) var(--space-lg);
    text-align: center;
  }
  
  .auth-header h1 {
    font-size: 1.75rem;
  }
  
  .auth-subtitle {
    max-width: 100%;
    font-size: 1rem;
  }
  
  .brand-logo {
    justify-content: center;
  }
  
  .brand-features {
    display: none;
  }
  
  .auth-form-wrapper {
    flex: 0 0 auto;
    padding: var(--space-lg);
    max-height: none;
  }
  
  .compact-form-row {
    flex-direction: column;
    gap: var(--space-sm);
  }
  
  .social-buttons {
    grid-template-columns: 1fr;
    gap: var(--space-sm);
  }
  
  .social-btn {
    flex-direction: row;
    justify-content: flex-start;
    padding: var(--space-md) var(--space-lg);
  }
  
  .social-btn i {
    margin-bottom: 0;
    margin-right: var(--space-md);
  }
}

/* Small Mobile (0px - 479px) */
@media (max-width: 479px) {
  .compact-auth-page {
    padding: var(--space-xs);
  }
  
  .auth-header {
    padding: var(--space-lg) var(--space-md);
  }
  
  .auth-form-wrapper {
    padding: var(--space-md);
  }
  
  .compact-input-group input,
  .compact-input-group select {
    height: 52px;
    font-size: 0.95rem;
  }
  
  .btn {
    padding: var(--space-md) var(--space-lg);
    font-size: 0.95rem;
  }
}

/* Large Desktop (1200px+) */
@media (min-width: 1200px) {
  .compact-auth-card {
    max-width: 1100px;
    margin: 0 auto;
  }
}

/* Print Styles */
@media print {
  .compact-auth-page {
    background: none;
    padding: 0;
  }
  
  .compact-auth-card {
    box-shadow: none;
    border: 1px solid var(--medium-gray);
  }
  
  .btn,
  .social-login,
  .toggle-password {
    display: none;
  }
}