/* ─────────────────────────────────────────────
   IELTS PLATFORM – SHARED GLOBAL STYLES  
   Common styles used across student and teacher dashboards
───────────────────────────────────────────── */

/* =====  DESIGN TOKENS  ===== */
:root {
  /* Light Theme Palette */
  --color-background:#FFFFFF;
  --color-surface:#FFFFFF;
  --color-bg-subtle:#F8F9FA;
  --color-border:#E5E7EB;
  --color-card-border:#E5E7EB;
  --color-text:#111827;
  --color-text-secondary:#6B7280;
  --color-text-muted:#9CA3AF;
  --color-primary:#0056B3;
  --color-accent:#F28500;
  --color-success:#10B981;
  --color-danger:#DC2626;
  --color-warning:#F59E0B;
  --shadow-card:0 1px 3px rgba(0,0,0,.1),0 1px 2px rgba(0,0,0,.06);
  --shadow-hover:0 4px 6px rgba(0,0,0,.07),0 2px 4px rgba(0,0,0,.06);

  /* Typography & spacing - using dynamic units */
  --font-family-base:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
  --font-size-xs:0.75rem;
  --font-size-sm:0.875rem;
  --font-size-base:1rem;
  --font-size-lg:1.125rem;
  --font-size-xl:1.25rem;
  --font-size-2xl:1.5rem;
  --font-size-3xl:1.875rem;
  --font-size-4xl:2.25rem;
  --line-height-tight:1.25;
  --line-height-snug:1.375;
  --line-height-normal:1.5;
  --line-height-relaxed:1.625;

  /* Dynamic spacing using em/rem */
  --spacing-xs:0.5rem;
  --spacing-sm:0.75rem;
  --spacing-md:1rem;
  --spacing-lg:1.5rem;
  --spacing-xl:2rem;
  --spacing-2xl:2.5rem;
  --spacing-3xl:3rem;

  --radius-sm:0.375rem;
  --radius-base:0.5rem;
  --radius-lg:0.75rem;
  --radius-xl:1rem;
  --gap-card:1.5rem;

  /* Common dimensions */
  --sidebar-width:16rem;
  --sidebar-width-collapsed:4rem;
  --duration-fast:150ms;
  --ease-standard:cubic-bezier(.16,1,.3,1);
  --font-weight-medium: 500;
  --font-weight-semibold: 550;
  --font-weight-bold: 600;
  --line-height-tight: 1.2;
  --line-height-normal: 1.5;
  --letter-spacing-tight: -0.01em;

  /* Spacing */
  --space-4: 0.25rem;
  --space-6: 0.375rem;
  --space-8: 0.5rem;
  --space-12: 0.75rem;
  --space-16: 1rem;
  --space-20: 1.25rem;
  --space-24: 1.5rem;
  --space-32: 2rem;

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-base: 0.5rem;
  --radius-md: 0.625rem;
  --radius-lg: 0.75rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3), 0 1px 2px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3),
    0 2px 4px -1px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3),
    0 4px 6px -2px rgba(0, 0, 0, 0.2);

  /* Animation */
  --duration-fast: 150ms;
  --duration-normal: 250ms;
  --ease-standard: cubic-bezier(0.16, 1, 0.3, 1);

  --status-bg-opacity: 0.15;
  --status-border-opacity: 0.25;
}



/* Global focus styles for accessibility */
*:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* Base styles */
html {
  font-size: var(--font-size-base);
  font-family: var(--font-family-base);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background-color: var(--color-background);
  -webkit-font-smoothing: antialiased;
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
}

*,
*::before,
*::after {
  box-sizing: inherit;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0;
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-tight);
  color: var(--color-text);
  letter-spacing: var(--letter-spacing-tight);
}

h1 {
  font-size: var(--font-size-4xl);
}
h2 {
  font-size: var(--font-size-3xl);
}
h3 {
  font-size: var(--font-size-2xl);
}
h4 {
  font-size: var(--font-size-xl);
}
h5 {
  font-size: var(--font-size-lg);
}
h6 {
  font-size: var(--font-size-md);
}

p {
  margin: 0 0 var(--space-16) 0;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-standard);
}

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

/* =====  UNIFIED SIDEBAR STYLES  ===== */
.sidebar {
  width: 280px;
  background: var(--color-surface);
  border-right: 1px solid var(--color-border);
  transition: width var(--duration-fast) ease;
  overflow: hidden;
  position: relative;
}

.sidebar-toggle {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  width: 100%;
  padding: var(--spacing-lg) var(--spacing-xl);
  background: none;
  border: none;
  color: var(--color-text);
  font-size: var(--font-size-base);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--duration-fast) ease;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--spacing-lg);
  gap: var(--spacing-md);
}

.sidebar-toggle:hover {
  background: var(--color-bg-subtle);
}

.sidebar-toggle i {
  font-size: 1.2rem;
  color: var(--color-primary);
  flex-shrink: 0;
}

.sidebar-toggle .toggle-text {
  transition: opacity var(--duration-fast) ease;
  white-space: nowrap;
}

.sidebar--collapsed {
  width: 56px;
}

.sidebar--collapsed .sidebar-toggle {
  justify-content: center;
  padding: var(--spacing-lg) var(--spacing-sm);
}

.sidebar--collapsed .toggle-text {
  opacity: 0;
  display: none;
}

/* Navigation Menu Styles */
.nav-menu {
  list-style: none;
  padding: 0 var(--spacing-md);
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.nav-item, 
.nav-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md) var(--spacing-lg);
  color: var(--color-text-secondary);
  text-decoration: none;
  border-radius: var(--radius-base);
  transition: all var(--duration-fast) ease;
  font-weight: 500;
  font-size: var(--font-size-sm);
  position: relative;
  width: 100%;
  box-sizing: border-box;
  border: none;
  background: none;
  cursor: pointer;
  text-align: left;
}

.nav-item:hover,
.nav-link:hover {
  background: var(--color-bg-subtle);
  color: var(--color-text);
  transform: translateX(2px);
}

.nav-item.active,
.nav-link.active,
.nav-item--active .nav-link {
  background: var(--color-primary);
  color: var(--color-surface);
}

.nav-item i,
.nav-link i {
  font-size: 1.2rem;
  width: 1.5rem;
  text-align: center;
  flex-shrink: 0;
  color: inherit;
}

.nav-item span,
.nav-link span {
  transition: opacity var(--duration-fast) ease;
  white-space: nowrap;
  overflow: hidden;
}

/* Collapsed state */
.sidebar--collapsed .nav-item,
.sidebar--collapsed .nav-link {
  justify-content: center;
  padding: var(--spacing-md) var(--spacing-sm);
}

.sidebar--collapsed .nav-item span,
.sidebar--collapsed .nav-link span {
  opacity: 0;
  display: none;
}

.sidebar--collapsed .nav-item i,
.sidebar--collapsed .nav-link i {
  font-size: 1.4rem;
}

/* Tooltips for collapsed sidebar */
.sidebar--collapsed .nav-item::after,
.sidebar--collapsed .nav-link::after {
  content: attr(data-tooltip);
  position: absolute;
  left: calc(100% + var(--spacing-sm));
  top: 50%;
  transform: translateY(-50%);
  background: var(--color-text);
  color: var(--color-surface);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-base);
  font-size: var(--font-size-xs);
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-fast) ease;
  z-index: 1000;
}

.sidebar--collapsed .nav-item:hover::after,
.sidebar--collapsed .nav-link:hover::after {
  opacity: 1;
}

/* =====  BUTTONS  ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-8) var(--space-16);
  border-radius: var(--radius-base);
  font-size: var(--font-size-base);
  font-weight: 500;
  line-height: 1.5;
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-standard);
  border: none;
  text-decoration: none;
  position: relative;
}

.btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--color-focus-ring);
}

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

.btn--primary:hover {
  background: var(--color-primary-hover);
}

.btn--primary:active {
  background: var(--color-primary-active);
}

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

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

.btn--secondary:active {
  background: var(--color-secondary-active);
}

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

.btn--outline:hover {
  background: var(--color-secondary);
}

.btn--sm {
  padding: var(--space-4) var(--space-12);
  font-size: var(--font-size-sm);
  border-radius: var(--radius-sm);
}

.btn--lg {
  padding: var(--space-12) var(--space-20);
  font-size: var(--font-size-lg);
  border-radius: var(--radius-md);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Form elements */
.form-control {
  display: block;
  width: 100%;
  padding: var(--space-8) var(--space-12);
  font-size: var(--font-size-md);
  line-height: 1.5;
  color: var(--color-text);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-base);
  transition: border-color var(--duration-fast) var(--ease-standard),
    box-shadow var(--duration-fast) var(--ease-standard);
}

.form-control:focus {
  border-color: var(--color-primary);
  outline: 2px solid var(--color-primary);
}

.form-label {
  display: block;
  margin-bottom: var(--space-8);
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-sm);
}

.form-group {
  margin-bottom: var(--space-16);
}

/* Status indicators */
.status {
  display: inline-flex;
  align-items: center;
  padding: var(--space-6) var(--space-12);
  border-radius: var(--radius-full);
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-sm);
}

.status--success {
  background-color: rgba(
    var(--color-success-rgb, 33, 128, 141),
    var(--status-bg-opacity)
  );
  color: var(--color-success);
  border: 1px solid
    rgba(var(--color-success-rgb, 33, 128, 141), var(--status-border-opacity));
}

.status--error {
  background-color: rgba(
    var(--color-error-rgb, 192, 21, 47),
    var(--status-bg-opacity)
  );
  color: var(--color-error);
  border: 1px solid
    rgba(var(--color-error-rgb, 192, 21, 47), var(--status-border-opacity));
}

.status--warning {
  background-color: rgba(
    var(--color-warning-rgb, 168, 75, 47),
    var(--status-bg-opacity)
  );
  color: var(--color-warning);
  border: 1px solid
    rgba(var(--color-warning-rgb, 168, 75, 47), var(--status-border-opacity));
}





.page {
  display: none;
}

.page.active {
  display: block;
}

.page-header {
  margin-bottom: var(--space-32);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.page-header h2 {
  font-size: var(--font-size-3xl);
  margin: 0;
  color: var(--color-text);
}

.page-subtitle {
  color: var(--color-text-secondary);
  margin: var(--space-8) 0 0 0;
  font-size: var(--font-size-lg);
}

/* ===== AUTHENTICATION SUCCESS PAGE STYLES ===== */
.auth-success-container {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 80vh;
  padding: var(--spacing-xl);
  background: linear-gradient(135deg, #f9f9f9 0%, #ffffff 100%);
}

.auth-success-card {
  background: #ffffff;
  border-radius: 16px;
  padding: var(--spacing-3xl);
  box-shadow: 0 10px 40px rgba(0, 86, 179, 0.1);
  border: 1px solid rgba(0, 86, 179, 0.08);
  max-width: 800px;
  width: 100%;
  text-align: center;
}

.auth-success-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--spacing-xl) auto;
  background: #0056B3;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 2.5rem;
  box-shadow: 0 8px 24px rgba(0, 86, 179, 0.2);
}

.auth-success-title {
  font-size: 2.25rem;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: var(--spacing-md);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

.auth-success-subtitle {
  font-size: 1.125rem;
  color: #6B7280;
  margin-bottom: var(--spacing-3xl);
  font-weight: 400;
}

.user-details-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-3xl);
  text-align: left;
}

.user-detail-section {
  background: #F9F9F9;
  border-radius: 12px;
  padding: var(--spacing-xl);
  border: 1px solid #E5E7EB;
}

.detail-section-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: #0056B3;
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-sm);
  border-bottom: 2px solid #0056B3;
}

.detail-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-sm) 0;
  border-bottom: 1px solid #E5E7EB;
}

.detail-item:last-child {
  border-bottom: none;
}

.detail-item.batches-item {
  align-items: flex-start;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.detail-label {
  font-weight: 500;
  color: #374151;
  font-size: 0.875rem;
}

.detail-value {
  font-weight: 600;
  color: #1A1A1A;
  font-size: 0.875rem;
}

.status-badge {
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.status-badge.status-active {
  background: rgba(16, 185, 129, 0.1);
  color: #10B981;
  border: 1px solid rgba(16, 185, 129, 0.2);
}

.status-badge.status-inactive {
  background: rgba(107, 114, 128, 0.1);
  color: #6B7280;
  border: 1px solid rgba(107, 114, 128, 0.2);
}

.batch-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
  margin-top: var(--spacing-xs);
}

.batch-tag {
  background: #0056B3;
  color: white;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: 8px;
  font-size: 0.75rem;
  font-weight: 500;
}

.google-auth-indicator {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  color: #6B7280;
  font-size: 0.875rem;
}

.google-auth-indicator i {
  color: #EA4335;
}

.auth-success-actions {
  display: flex;
  gap: var(--spacing-lg);
  justify-content: center;
  flex-wrap: wrap;
}

.auth-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-lg) var(--spacing-xl);
  border-radius: 12px;
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  transition: all 0.2s ease;
  min-width: 160px;
  justify-content: center;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

.auth-btn-primary {
  background: #0056B3;
  color: white;
  border: 2px solid #0056B3;
}

.auth-btn-primary:hover {
  background: #004494;
  border-color: #004494;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(0, 86, 179, 0.3);
  color: white;
}

.auth-btn-secondary {
  background: transparent;
  color: #6B7280;
  border: 2px solid #E5E7EB;
}

.auth-btn-secondary:hover {
  background: #F9F9F9;
  border-color: #D1D5DB;
  color: #374151;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

/* Mobile responsiveness for auth success page */
@media (max-width: 768px) {
  .auth-success-container {
    padding: var(--spacing-lg);
    min-height: 70vh;
  }
  
  .auth-success-card {
    padding: var(--spacing-xl);
  }
  
  .auth-success-title {
    font-size: 1.75rem;
  }
  
  .auth-success-subtitle {
    font-size: 1rem;
  }
  
  .user-details-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }
  
  .auth-success-actions {
    flex-direction: column;
    align-items: center;
  }
  
  .auth-btn {
    width: 100%;
    max-width: 280px;
  }
  
  .detail-item.batches-item {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .batch-tags {
    width: 100%;
  }
}

/* Utility classes */
.hidden {
  display: none;
}

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