:root, .dark-theme {
  /* Premium Palette — Deep Ocean & Electric Indigo */
  --bg-void:      #05070A;
  --bg-surface:   #0C0F17;
  --bg-card:      #121620;
  --bg-elevated:  #1A1F2E;
  --bg-glass:     rgba(18, 22, 32, 0.7);
  
  /* Primary — High-End Indigo Gradient */
  --accent-primary:   #6366F1;
  --accent-secondary: #8B5CF6;
  --accent-glow:      rgba(99, 102, 241, 0.3);
  
  /* Teal (New Addition for consistency) */
  --teal:         #2DD4BF;
  --teal-dim:     rgba(45, 212, 191, 0.1);
  --teal-glow:    rgba(45, 212, 191, 0.3);
  --border-teal:   rgba(45, 212, 191, 0.2);

  /* Status Colors — Muted but Clear */
  --success:      #10B981;
  --completed:    #10B981;
  --warning:      #F59E0B;
  --amber:        #F59E0B;
  --error:        #EF4444;
  --cancelled:    #EF4444;
  --info:         #3B82F6;
  --pending:      #F59E0B;
  --no-show:      #EF4444;

  /* Text — Better Contrast */
  --text-primary:   #F8FAFC;
  --text-secondary: #94A3B8;
  --text-muted:     #475569;

  /* Borders & Shadows — Soft & Depth */
  --border:       rgba(255, 255, 255, 0.08);
  --border-bright: rgba(255, 255, 255, 0.15);
  --shadow-sm:    0 2px 4px rgba(0,0,0,0.1);
  --shadow-md:    0 12px 24px -6px rgba(0,0,0,0.3);
  --shadow-lg:    0 20px 40px -12px rgba(0,0,0,0.5);

  /* Spacing & Radius */
  --radius-sm:    12px;
  --radius-md:    20px;
  --radius-lg:    28px;
  --radius:       12px;
  --transition:   all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
  
  /* Fonts */
  --font-display: 'Plus Jakarta Sans', 'Cairo', sans-serif;
  --font-body:    'Inter', 'Cairo', sans-serif;
}

/* Light Theme Overrides */
.light-theme {
  --bg-void:      #F8FAFC;
  --bg-surface:   #FFFFFF;
  --bg-card:      #F1F5F9;
  --bg-elevated:  #E2E8F0;
  --bg-glass:     rgba(255, 255, 255, 0.7);
  
  --text-primary:   #0F172A;
  --text-secondary: #475569;
  --text-muted:     #94A3B8;

  --border:       rgba(0, 0, 0, 0.08);
  --border-bright: rgba(0, 0, 0, 0.15);
  --border-teal:   rgba(45, 212, 191, 0.3);
  
  --shadow-sm:    0 2px 4px rgba(0,0,0,0.05);
  --shadow-md:    0 12px 24px -6px rgba(0,0,0,0.1);
  --shadow-lg:    0 20px 40px -12px rgba(0,0,0,0.15);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-void);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  background-image: 
    radial-gradient(circle at 0% 0%, rgba(99, 102, 241, 0.05) 0%, transparent 50%),
    radial-gradient(circle at 100% 100%, rgba(139, 92, 246, 0.05) 0%, transparent 50%);
  background-attachment: fixed;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.03em;
}

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

button {
  font-family: var(--font-body);
  cursor: pointer;
  border: none;
  transition: var(--transition);
  outline: none;
}

/* Premium Glass Panel */
.glass-panel {
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-bright);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
}

/* Premium Buttons */
.btn-primary {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  color: white;
  padding: 14px 28px;
  border-radius: 100px;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  border: none;
  box-shadow: 0 8px 20px -6px var(--accent-glow);
  transition: var(--transition);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-size: 0.9rem;
}

.btn-primary:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 15px 30px -8px var(--accent-glow);
  filter: brightness(1.1);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
  border: 1px solid var(--border-bright);
  padding: 14px 28px;
  border-radius: 100px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  transition: var(--transition);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--accent-primary);
  transform: translateY(-2px);
}

/* Form Inputs */
.form-group {
  margin-bottom: 24px;
}

.form-group label {
  display: block;
  margin-bottom: 10px;
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 16px 20px;
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 1rem;
  transition: var(--transition);
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  border-color: var(--accent-primary);
  outline: none;
  background: rgba(255, 255, 255, 0.06);
  box-shadow: 0 0 0 4px var(--accent-glow);
}

::placeholder {
  color: var(--text-muted);
  opacity: 0.5;
}

/* Layout Utilities */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.gap-4 { gap: 16px; }

/* Utility Classes */
.hidden { display: none !important; }
.text-teal { color: var(--teal) !important; }
.text-amber { color: var(--amber) !important; }
.text-green { color: var(--completed) !important; }
.text-purple { color: #C084FC !important; }
.text-secondary { color: var(--text-secondary) !important; }
.text-muted { color: var(--text-muted) !important; }
.text-danger { color: var(--cancelled) !important; }

.bg-transparent { background: transparent !important; }
.border-none { border: none !important; }
.outline-none { outline: none !important; }
.w-full { width: 100% !important; }
.flex-1 { flex: 1 !important; }
.flex-col { flex-direction: column !important; }

.font-body { font-family: var(--font-body) !important; }
.font-mono { font-family: var(--font-mono) !important; }

.btn-sm { padding: 8px 16px !important; font-size: 0.9rem !important; }
.btn-xs { padding: 4px 12px !important; font-size: 0.8rem !important; }

.p-24 { padding: 24px !important; }
.p-20 { padding: 20px !important; }
.radius-sm { border-radius: var(--radius-sm) !important; }
.border { border: 1px solid var(--border) !important; }
.border-teal { border: 1px solid var(--border-teal) !important; }
.border-danger { border: 1px solid var(--cancelled) !important; }
.bg-surface { background: var(--bg-surface) !important; }
.bg-void { background: var(--bg-void) !important; }

.mb-24 { margin-bottom: 24px !important; }
.mb-12 { margin-bottom: 12px !important; }
.mt-8 { margin-top: 8px !important; }
.mt-16 { margin-top: 16px !important; }
.mt-24 { margin-top: 24px !important; }
.mb-16 { margin-bottom: 16px !important; }
.mt-32 { margin-top: 32px !important; }
.mb-32 { margin-bottom: 32px !important; }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }

.whitespace-nowrap { white-space: nowrap !important; }
.p-8-16 { padding: 8px 16px !important; }
.ml-8 { margin-left: 8px !important; }
.mr-8 { margin-right: 8px !important; }
.d-block { display: block !important; }

.cursor-pointer { cursor: pointer !important; }

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: transparent; 
}
::-webkit-scrollbar-thumb {
  background: var(--border-teal); 
  border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--teal); 
}

/* Animations & Keyframes */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInRight {
  from { opacity: 0; transform: translateX(20px); } /* RTL optimized */
  to { opacity: 1; transform: translateX(0); }
}

@keyframes float {
  0% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
  100% { transform: translateY(0); }
}

@keyframes scaleUp {
  from { opacity: 0; transform: scale(0.95); }
  to { opacity: 1; transform: scale(1); }
}

.fade-up {
  animation: fadeUp 0.4s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.fade-in-right {
  animation: fadeInRight 0.4s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.stagger-1 { animation-delay: 0.05s; }
.stagger-2 { animation-delay: 0.1s; }
.stagger-3 { animation-delay: 0.15s; }
.stagger-4 { animation-delay: 0.2s; }
.stagger-5 { animation-delay: 0.25s; }
.stagger-6 { animation-delay: 0.3s; }
.stagger-7 { animation-delay: 0.35s; }
.stagger-8 { animation-delay: 0.4s; }
.stagger-9 { animation-delay: 0.45s; }
.stagger-10 { animation-delay: 0.5s; }

/* Micro interaction loader */
.btn-loading {
  position: relative;
  color: transparent !important;
  pointer-events: none;
}

.btn-loading::after {
  content: '';
  position: absolute;
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255,255,255,0.3);
  border-left-color: #fff;
  border-radius: 50%;
  animation: spin 1s linear infinite;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.btn-primary.btn-loading::after {
  border: 2px solid rgba(0,0,0,0.2);
  border-left-color: #000;
}

@keyframes spin {
  from { transform: translate(-50%, -50%) rotate(0deg); }
  to { transform: translate(-50%, -50%) rotate(360deg); }
}

/* --- LANDING PAGE STYLES --- */

.hero {
  text-align: center;
  padding: 100px 20px 60px;
  max-width: 800px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--teal-dim);
  color: var(--teal);
  padding: 6px 16px;
  border-radius: 100px;
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 32px;
  border: 1px solid var(--border-teal);
}

.badge-dot {
  width: 8px;
  height: 8px;
  background: var(--teal);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--teal);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(45,212,191, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 6px rgba(45,212,191, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(45,212,191, 0); }
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  line-height: 1.1;
  margin-bottom: 24px;
}

.hero-highlight {
  color: var(--teal);
  position: relative;
  display: inline-block;
}

.hero-highlight::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 100%;
  height: 8px;
  background: var(--teal-dim);
  border-radius: 4px;
}

.hero-subtitle {
  color: var(--text-secondary);
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto 40px;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
}

.btn-primary-hero {
  background: var(--teal);
  color: #fff;
  padding: 16px 32px;
  border-radius: 100px;
  font-weight: 600;
  font-size: 1.1rem;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
}

.btn-primary-hero:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px var(--teal-glow);
}

.btn-ghost-hero {
  background: var(--bg-glass);
  color: var(--text-primary);
  border: 1px solid var(--border);
  padding: 16px 32px;
  border-radius: var(--radius);
  font-weight: 500;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  gap: 8px;
}

.btn-ghost-hero:hover {
  background: var(--bg-surface);
  border-color: var(--text-muted);
}

/* Nav */
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 40px;
  border-bottom: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.75);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 100;
}

:root.dark-theme .navbar {
  background: rgba(10, 11, 15, 0.8);
}

.nav-brand {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
}

nav.nav-links {
  display: flex;
  gap: 32px;
}

nav.nav-links a {
  color: var(--text-secondary);
  font-weight: 500;
}

nav.nav-links a:hover {
  color: var(--text-primary);
}

/* Pricing Grid */
.pricing-section {
  padding: 100px 20px;
  text-align: center;
  max-width: 1200px;
  margin: 0 auto;
}

.pricing-section h2 {
  font-size: 2.5rem;
  margin-bottom: 60px;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 32px;
  align-items: center;
}

.pricing-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px 32px;
  text-align: right;
  position: relative;
  transition: var(--transition);
}

.pricing-card:hover {
  transform: translateY(-8px);
  border-color: var(--border-teal);
  box-shadow: 0 12px 32px rgba(0,0,0,0.5);
}

.pricing-card.featured {
  background: var(--bg-card);
  border-color: var(--teal);
  transform: scale(1.05);
  box-shadow: 0 16px 48px var(--teal-dim);
}

.pricing-card.featured:hover {
  transform: scale(1.05) translateY(-8px);
}

.plan-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--teal);
  color: #000;
  padding: 4px 16px;
  border-radius: 100px;
  font-size: 0.85rem;
  font-weight: 700;
}

.plan-name {
  font-size: 1.5rem;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.pricing-card.featured .plan-name {
  color: var(--teal);
}

.plan-price {
  font-size: 3rem;
  font-weight: 700;
  font-family: var(--font-display);
  margin-bottom: 32px;
}

.plan-price span {
  font-size: 1rem;
  color: var(--text-secondary);
  font-weight: 400;
}

.plan-features {
  list-style: none;
  margin-bottom: 40px;
}

.plan-features li {
  margin-bottom: 16px;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 12px;
}

.plan-features li i {
  color: var(--teal);
}

.btn-plan-free, .btn-plan-business {
  width: 100%;
  padding: 16px;
  border-radius: var(--radius-sm);
  background: var(--bg-elevated);
  color: var(--text-primary);
  font-weight: 600;
  border: 1px solid var(--border);
}

.btn-plan-pro {
  width: 100%;
  padding: 16px;
  border-radius: var(--radius-sm);
  background: var(--teal);
  color: #000;
  font-weight: 600;
}

.btn-plan-pro:hover {
  background: #34E5CE;
  box-shadow: 0 4px 16px var(--teal-glow);
}

/* Auth Modal Overlay classes for app.html */
.auth-screen {
  position: fixed;
  inset: 0;
  background: rgba(10, 11, 15, 0.95);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.auth-box {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 48px;
  border-radius: var(--radius);
  width: 100%;
  max-width: 440px;
  text-align: center;
  box-shadow: 0 24px 64px rgba(0,0,0,0.5);
  animation: slideUp 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.auth-logo {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 24px;
  color: var(--teal);
}

.auth-title {
  font-size: 2rem;
  margin-bottom: 8px;
}

.auth-sub {
  color: var(--text-secondary);
  margin-bottom: 32px;
}

.btn-google-login {
  width: 100%;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 14px;
  border-radius: var(--radius-sm);
  font-weight: 500;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-bottom: 24px;
}

.btn-google-login:hover {
  background: var(--bg-elevated);
  border-color: var(--text-muted);
}

.auth-divider {
  position: relative;
  text-align: center;
  margin: 24px 0;
}

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

.auth-divider span {
  background: var(--bg-card);
  padding: 0 16px;
  color: var(--text-muted);
  position: relative;
  font-size: 0.9rem;
}

.auth-box .form-group {
  text-align: right;
}

.btn-auth-submit {
  width: 100%;
  background: var(--teal);
  color: #000;
  padding: 14px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  margin-bottom: 12px;
}

.forgot-link {
  display: block;
  text-align: center;
  color: var(--teal);
  font-size: 0.9rem;
  margin-bottom: 16px;
  text-decoration: none;
}

.forgot-link:hover {
  text-decoration: underline;
  opacity: 0.8;
}

.btn-auth-submit:hover {
  background: #4F52E8;
  box-shadow: 0 4px 16px var(--teal-glow);
}

.auth-switch {
  margin-top: 32px;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.auth-switch button {
  background: transparent;
  color: var(--teal);
  font-weight: 500;
}

@media (max-width: 768px) {
  .navbar { padding: 14px 16px; }
  nav.nav-links { display: none; }
  .hero { padding: 60px 16px 40px; }
  .hero-actions { flex-direction: column; gap: 12px; }
  .btn-primary-hero, .btn-ghost-hero { width: 100%; justify-content: center; }
  .auth-box {
    border-radius: 24px 24px 0 0;
    min-height: 100svh;
    padding: 40px 24px;
    justify-content: center;
    display: flex;
    flex-direction: column;
  }

  /* PWA install prompt area */
  .pwa-install-banner {
    position: fixed;
    bottom: 0; left: 0; right: 0;
    background: var(--bg-surface);
    border-top: 1px solid var(--border);
    padding: 16px 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    z-index: 9000;
    box-shadow: 0 -8px 32px rgba(0,0,0,0.15);
    animation: slideUpBanner 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  }

  @keyframes slideUpBanner {
    from { transform: translateY(100%); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
  }
}

/* --- TOAST NOTIFICATIONS --- */
#toastContainer {
  position: fixed;
  bottom: 32px;
  left: 32px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  z-index: 9999;
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  min-width: 280px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  padding: 16px 20px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  gap: 12px;
  box-shadow: 0 12px 32px rgba(0,0,0,0.12);
  transform-origin: left bottom;
  animation: toastIn 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  transition: all 0.4s ease;
}

.toast.removing {
  opacity: 0;
  transform: translateX(-24px) scale(0.95);
}

.toast i {
  font-size: 1.4rem;
}

.toast.success i { color: #10B981; }
.toast.error i { color: #EF4444; }

@keyframes toastIn {
  from { opacity: 0; transform: translateY(24px) scale(0.9); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}