:root {
  --color-primary: #1976D2;        /* WebDukaan blue */
  --color-primary-dark: #135097;
  --color-accent: #FF6C1B;         /* WebDukaan orange */
  --color-bg-1: #EBF4FF;
  --color-bg-2: #FFF4E7;
  --color-surface: #fff;
  --color-text: #212529;
  --color-text-secondary: #6C757D;
  --color-border: #E3E8EF;
  --color-error: #C9282D;
  --radius-base: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  --shadow-lg: 0 8px 32px rgba(25, 118, 210, 0.13);
  --shadow-sm: 0 2px 8px rgba(25, 118, 210, 0.11);
  --font-family-base: "Inter", "Geist", Arial, sans-serif;
  --space-xs: 0.4rem;
  --space-sm: 0.8rem;
  --space-md: 1.2rem;
  --space-lg: 2rem;
  --space-xl: 2.8rem;
  --space-2xl: 4rem;
  --font-size-xs: 12px;
  --font-size-sm: 14px;
  --font-size-base: 16px;
  --font-size-lg: 20px;
  --font-size-xl: 28px;
}

/* Reset and base */
*, *::before, *::after { box-sizing: border-box; }
body {
  background: linear-gradient(100deg, var(--color-bg-1), var(--color-bg-2));
  font-family: var(--font-family-base);
  color: var(--color-text);
  min-height: 100vh;
  margin: 0;
  padding: 0;
}

.auth-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-xl) var(--space-md);
  background: inherit;
}

.auth-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  max-width: 420px;
  width: 100%;
  overflow: hidden;
  position: relative;
  padding: var(--space-xl) var(--space-lg);
  display: flex;
  flex-direction: column;
  animation: fade-in-up 0.45s cubic-bezier(0.16,1,0.3,1) both;
}
@keyframes fade-in-up {
  from { opacity: 0; transform: translateY(28px);}
  to { opacity: 1; transform: translateY(0);}
}
.auth-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
}

.auth-header {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}
.back-btn {
  background: var(--color-bg-1);
  border: none;
  border-radius: 50%;
  width: 40px; height: 40px;
  display: flex; align-items: center; justify-content: center;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: background 0.17s, transform 0.18s;
}
.back-btn:hover { background: var(--color-primary); color: #fff; transform: scale(1.12);}
.logo {
  display: flex; align-items: center; gap: var(--space-xs);
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.5px;
}
.logo i { color: var(--color-accent); margin-right: var(--space-xs); }
.logo span { color: var(--color-primary); }

.auth-content h2 {
  font-size: var(--font-size-lg);
  font-weight: 700;
  margin-bottom: var(--space-xs);
  color: var(--color-primary);
  text-align: left;
}
.auth-subtitle {
  margin-bottom: var(--space-lg);
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
}

.auth-form {
  margin-top: var(--space-md);
  margin-bottom: var(--space-lg);
}
.form-group { margin-bottom: var(--space-md); }
.form-label {
  display: block;
  margin-bottom: 5px;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text);
}
.form-control {
  width: 100%;
  padding: calc(var(--space-xs) + 2px) var(--space-md);
  font-size: var(--font-size-base);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-base);
  background: var(--color-bg-1);
  color: var(--color-text);
  transition: border-color 0.14s;
}
.form-control:focus {
  border-color: var(--color-primary);
  outline: 2px solid var(--color-primary);
  background: #fff;
}

.password-field { position: relative; }
.password-toggle {
  position: absolute;
  right: 0.8rem;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--color-text-secondary);
  cursor: pointer;
  font-size: var(--font-size-base);
  padding: 3px;
  transition: color 0.16s;
}
.password-toggle:hover { color: var(--color-primary); }
#password-eye { font-size: 1.13em; }

.form-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.checkbox-label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: var(--font-size-sm);
  cursor: pointer;
  color: var(--color-text-secondary);
}
.checkbox-label input[type="checkbox"] {
  accent-color: var(--color-accent);
  width: 16px; height: 16px; margin: 0 3px 0 0;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 0;
  font-size: var(--font-size-base);
  font-weight: 600;
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  width: 100%;
  margin-top: var(--space-md);
  margin-bottom: 4px;
  transition: background 0.18s, box-shadow 0.18s;
}
.btn--primary { background: var(--color-primary);}
.btn--primary:hover,
.btn--primary:focus { background: var(--color-primary-dark);}
.btn--full-width { width: 100%; }
.btn--lg { padding: 1rem 0; font-size: var(--font-size-lg);}
.btn-loading {
  display: inline-flex;
  align-items: center;
  margin-left: 8px;
}
.btn-loading.hidden {
  display: none !important;
}
.spinner-sm {
  width: 18px; height: 18px;
  border: 2px solid #eee;
  border-top: 2px solid var(--color-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-left: 6px;
}
@keyframes spin {
  0% { transform: rotate(0deg);}
  100% { transform: rotate(360deg);}
}

/* Demo accounts */
.demo-accounts {
  margin: var(--space-xl) 0 var(--space-lg) 0;
  padding: var(--space-md);
  background: var(--color-bg-2);
  border-radius: var(--radius-base);
  border: 1px solid var(--color-border);
}
.demo-accounts h4 {
  margin: 0 0 4px 0;
  color: var(--color-accent);
  font-weight: 600;
  font-size: var(--font-size-base);
}
.demo-help {
  color: var(--color-text-secondary);
  font-size: var(--font-size-xs);
  margin-bottom: var(--space-md);
}
.demo-account-grid {
  display: flex;
  gap: var(--space-sm);
  margin-top: var(--space-xs);
}
.demo-account-btn {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-sm);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-base);
  cursor: pointer;
  min-width: 120px;
  text-align: left;
  font-size: var(--font-size-sm);
  transition: box-shadow 0.14s, border-color 0.14s, background 0.15s;
}
.demo-account-btn strong { color: var(--color-primary); font-size: var(--font-size-sm);}
.demo-account-btn span { display: block; color: var(--color-text-secondary); font-size: var(--font-size-xs);}
.demo-account-btn i { font-size: 1.3em; color: var(--color-accent);}
.demo-account-btn:hover { background: var(--color-bg-1); border-color: var(--color-primary); box-shadow: var(--shadow-sm);}

.auth-switch {
  text-align: center;
  margin-top: var(--space-lg);
  padding-top: var(--space-sm);
  border-top: 1px solid var(--color-border);
}
.auth-switch p { color: var(--color-text-secondary);}
.link {
  color: var(--color-accent);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.15s;
}
.link:hover { color: var(--color-primary); text-decoration: underline;}
.forgot-link { color: var(--color-accent); }
.forgot-link:hover { color: var(--color-primary); text-decoration: underline;}

/* Overlay and Toast */
.loading-overlay {
  position: fixed;
  inset: 0;
  background: rgba(255,255,255,0.88);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  z-index: 9999;
  backdrop-filter: blur(4px);
}
.loading-overlay.hidden { display: none;}
.spinner {
  width: 40px; height: 40px;
  border: 4px solid #eee; border-top: 4px solid var(--color-primary);
  border-radius: 50%; animation: spin 1s linear infinite; margin-bottom: var(--space-md);
}
.toast-container {
  position: fixed; top: var(--space-md); right: var(--space-md); z-index: 99999;
}
.toast { 
  background: var(--color-surface); border-radius: var(--radius-base); padding: var(--space-sm) var(--space-lg);
  box-shadow: var(--shadow-sm); color: var(--color-text); border-left: 4px solid var(--color-accent); 
  margin-bottom: var(--space-sm);
  animation: fade-in-up 0.3s both;
}

/* Responsive */
@media (max-width: 600px) {
  .auth-card { padding: var(--space-lg) var(--space-md); max-width: 100vw;}
  .auth-header { flex-direction: column; gap: var(--space-sm);}
  .demo-account-grid { flex-direction: column; gap: var(--space-xs);}
  .auth-container { padding: var(--space-md) var(--space-xs);}
}
@media (max-width: 425px) {
  .auth-card { padding: var(--space-md) var(--space-xs);}
  .auth-header { gap: var(--space-xs);}
}

/* Utility classes */
.flex { display: flex; }
.justify-center { justify-content: center; }
.items-center { align-items: center; }
.gap-md { gap: var(--space-md);}
.gap-sm { gap: var(--space-sm);}
.mt-lg { margin-top: var(--space-lg);}
.mb-lg { margin-bottom: var(--space-lg);}