/* Base Variables & Settings */
:root {
  /* Light Theme Colors */
  --primary: #4285f4;
  --primary-dark: #1a73e8;
  --primary-light: #e8f0fe;
  --secondary: #34a853;
  --error: #ea4335;
  --warning: #fbbc04;
  --surface: #ffffff;
  --background: #f8f9fa;
  --on-primary: #ffffff;
  --on-surface: #202124;
  --on-background: #202124;
  --border: #dadce0;
  --shadow-color: rgba(60, 64, 67, 0.15);
  
  /* Animation Settings */
  --transition-fast: 150ms cubic-bezier(0.4, 0.0, 0.2, 1);
  --transition-standard: 300ms cubic-bezier(0.4, 0.0, 0.2, 1);
  --transition-emphasized: 500ms cubic-bezier(0.4, 0.0, 0.2, 1);
  
  /* Elevation Shadows */
  --elevation-1: 0 1px 2px 0 rgba(60, 64, 67, 0.3), 0 1px 3px 1px rgba(60, 64, 67, 0.15);
  --elevation-2: 0 2px 6px 2px rgba(60, 64, 67, 0.15);
  --elevation-3: 0 4px 8px 3px rgba(60, 64, 67, 0.15);
  
  /* Spacing */
  --spacing-xs: 4px;
  --spacing-s: 8px;
  --spacing-m: 16px;
  --spacing-l: 24px;
  --spacing-xl: 32px;
  
  /* Border Radius */
  --radius-s: 4px;
  --radius-m: 8px;
  --radius-l: 16px;
  --radius-xl: 28px;
}

/* Dark Theme */
@media (prefers-color-scheme: dark) {
  :root {
    --primary: #8ab4f8;
    --primary-dark: #669df6;
    --primary-light: #232e40;
    --surface: #202124;
    --background: #121212;
    --on-primary: #202124;
    --on-surface: #e8eaed;
    --on-background: #e8eaed;
    --border: #5f6368;
    --shadow-color: rgba(0, 0, 0, 0.3);
  }
}

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

body {
  font-family: 'Google Sans', 'Roboto', sans-serif;
  background-color: var(--background);
  color: var(--on-background);
  transition: background-color var(--transition-standard), color var(--transition-standard);
  margin: 0;
  padding: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  line-height: 1.5;
}

.wizard-container {
  max-width: 960px;
  width: 90%;
  margin: var(--spacing-xl) auto;
  background-color: var(--surface);
  border-radius: var(--radius-l);
  box-shadow: var(--elevation-2);
  padding: var(--spacing-xl);
  position: relative;
  overflow: hidden;
  transition: box-shadow var(--transition-standard), background-color var(--transition-standard);
}

.wizard-container:hover {
  box-shadow: var(--elevation-3);
}

.title {
  font-weight: 500;
  color: var(--primary);
  text-align: center;
  margin-bottom: var(--spacing-l);
  font-size: 2.25rem;
  transition: color var(--transition-standard);
}

h2 {
  color: var(--on-surface);
  margin-bottom: var(--spacing-l);
  font-weight: 500;
  font-size: 1.5rem;
  transition: color var(--transition-standard);
}

/* Progress Stepper */
.progress-bar {
  display: flex;
  margin-bottom: var(--spacing-xl);
  position: relative;
  counter-reset: step;
}

.progress-bar::before {
  content: '';
  position: absolute;
  height: 2px;
  background-color: var(--border);
  top: 16px;
  left: 0;
  right: 0;
  z-index: 1;
  transition: background-color var(--transition-standard);
}

.progress-bar::after {
  content: '';
  position: absolute;
  height: 2px;
  background-color: var(--primary);
  top: 16px;
  left: 0;
  z-index: 2;
  transition: width var(--transition-emphasized), background-color var(--transition-standard);
}

.progress-bar[data-step="1"]::after { width: 25%; }
.progress-bar[data-step="2"]::after { width: 50%; }
.progress-bar[data-step="3"]::after { width: 75%; }
.progress-bar[data-step="4"]::after { width: 100%; }

.step {
  flex: 1;
  text-align: center;
  position: relative;
  z-index: 3;
  transition: color var(--transition-standard);
}

.step::before {
  counter-increment: step;
  content: counter(step);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background-color: var(--border);
  color: var(--on-background);
  border-radius: 50%;
  margin: 0 auto var(--spacing-s);
  font-weight: 500;
  transition: background-color var(--transition-standard), color var(--transition-standard), transform var(--transition-emphasized);
}

.step.active::before {
  background-color: var(--primary);
  color: var(--on-primary);
  transform: scale(1.1);
}

.step.done::before {
  background-color: var(--secondary);
  color: var(--on-primary);
  content: '✓';
}

.step-section {
  display: none;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--transition-standard), transform var(--transition-standard);
}

.step-section.active {
  display: block;
  opacity: 1;
  transform: translateY(0);
  animation: fadeUpIn var(--transition-emphasized) forwards;
}

/* Course Input Form */
#courseContainer {
  margin-bottom: var(--spacing-l);
}

.course-row {
  display: flex;
  gap: var(--spacing-m);
  margin-bottom: var(--spacing-m);
  animation: fadeInLeft var(--transition-standard) forwards;
}

.input-field {
  position: relative;
  flex: 1;
}

.input-field input {
  width: 100%;
  padding: var(--spacing-m);
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-m);
  color: var(--on-surface);
  font-family: inherit;
  font-size: 1rem;
  transition: border var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-standard);
}

.input-field input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 2px var(--primary-light);
}

.input-field label {
  position: absolute;
  left: var(--spacing-m);
  top: 50%;
  transform: translateY(-50%);
  color: var(--border);
  pointer-events: none;
  transition: all var(--transition-fast);
}

.input-field input:focus + label,
.input-field input:not(:placeholder-shown) + label {
  top: 0;
  font-size: 0.75rem;
  background-color: var(--surface);
  padding: 0 var(--spacing-xs);
  color: var(--primary);
}

.remove-row {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: none;
  background-color: var(--error);
  color: white;
  cursor: pointer;
  font-size: 1.25rem;
  transition: background-color var(--transition-fast), transform var(--transition-fast);
  align-self: center;
}

.remove-row:hover {
  background-color: #d93025;
  transform: scale(1.05);
}

/* Buttons */
.button-row {
  display: flex;
  justify-content: space-between;
  margin-top: var(--spacing-l);
  gap: var(--spacing-m);
}

.btn {
  padding: var(--spacing-m) var(--spacing-xl);
  border-radius: var(--radius-m);
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.025em;
  text-transform: uppercase;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
  position: relative;
  overflow: hidden;
}

.btn::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 5px;
  height: 5px;
  background: rgba(255, 255, 255, 0.5);
  opacity: 0;
  border-radius: 100%;
  transform: scale(1, 1) translate(-50%, -50%);
  transform-origin: 50% 50%;
}

.btn:focus:not(:active)::after {
  animation: ripple 1s ease-out;
}

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

.btn.primary:hover {
  background-color: var(--primary-dark);
  box-shadow: var(--elevation-1);
}

.btn.secondary {
  background-color: transparent;
  color: var(--primary);
  box-shadow: inset 0 0 0 1px var(--primary);
}

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

.btn.text {
  background-color: transparent;
  color: var(--primary);
  padding: var(--spacing-s) var(--spacing-m);
}

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

.btn.icon {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-s);
}

.btn.icon svg {
  width: 18px;
  height: 18px;
}

/* Preview Table */
#previewTable {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin-bottom: var(--spacing-l);
  overflow: hidden;
  border-radius: var(--radius-m);
  box-shadow: var(--elevation-1);
}

#previewTable th,
#previewTable td {
  padding: var(--spacing-m);
  text-align: left;
  border-bottom: 1px solid var(--border);
  transition: background-color var(--transition-standard), color var(--transition-standard);
}

#previewTable th {
  background-color: var(--primary-light);
  color: var(--primary);
  font-weight: 500;
}

#previewTable tr:last-child td {
  border-bottom: none;
}

#previewTable tr:nth-child(even) {
  background-color: rgba(0, 0, 0, 0.02);
}

@media (prefers-color-scheme: dark) {
  #previewTable tr:nth-child(even) {
    background-color: rgba(255, 255, 255, 0.03);
  }
}

#previewTable tr {
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

#previewTable tr:hover {
  transform: translateY(-2px);
  box-shadow: var(--elevation-1);
  position: relative;
  z-index: 1;
}

#previewTable td:last-child {
  text-align: center;
}

#previewTable .remove-btn {
  background-color: transparent;
  color: var(--error);
  border: none;
  cursor: pointer;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color var(--transition-fast);
}

#previewTable .remove-btn:hover {
  background-color: rgba(234, 67, 53, 0.1);
}

/* Loader */
.loader-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-xl) 0;
  gap: var(--spacing-l);
}

.progress-text {
  color: var(--primary);
  font-weight: 500;
  text-align: center;
  margin-top: var(--spacing-m);
}

.loader {
  width: 60px;
  height: 60px;
  border: 4px solid var(--primary-light);
  border-radius: 50%;
  border-top: 4px solid var(--primary);
  animation: spin 1.2s cubic-bezier(0.4, 0.0, 0.2, 1) infinite;
}

/* Timetable Grid */
.grid-section {
  margin-top: var(--spacing-l);
  display: grid;
  grid-template-columns: 120px repeat(6, 1fr);
  gap: 2px;
  border-radius: var(--radius-m);
  overflow: hidden;
  box-shadow: var(--elevation-1);
  animation: fadeUpIn var(--transition-standard) forwards;
}

.cell {
  padding: var(--spacing-m);
  text-align: center;
  background-color: var(--surface);
  border: 1px solid var(--border);
  transition: background-color var(--transition-standard), color var(--transition-standard);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60px;
}

.header {
  background-color: var(--primary-light);
  color: var(--primary);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 0.875rem;
}

.day-header {
  background-color: var(--primary);
  color: var(--on-primary);
  font-weight: 500;
}

.time-slot {
  background-color: var(--primary-light);
  color: var(--primary);
  font-weight: 500;
}

.course-slot {
  background-color: var(--primary-light);
  color: var(--primary);
  font-weight: 500;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.course-slot:hover {
  transform: scale(1.03);
  box-shadow: var(--elevation-1);
  z-index: 1;
}

.free-slot {
  background-color: transparent;
  color: var(--on-surface);
  font-style: italic;
  opacity: 0.7;
}

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

@keyframes fadeInLeft {
  from {
    opacity: 0;
    transform: translateX(-20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

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

@keyframes ripple {
  0% {
    transform: scale(0, 0);
    opacity: 0.5;
  }
  20% {
    transform: scale(25, 25);
    opacity: 0.5;
  }
  100% {
    opacity: 0;
    transform: scale(40, 40);
  }
}

/* Media Queries */
@media screen and (max-width: 768px) {
  .wizard-container {
    width: 95%;
    padding: var(--spacing-m);
  }
  
  .grid-section {
    grid-template-columns: 80px repeat(6, 1fr);
    font-size: 0.75rem;
  }
  
  .cell {
    padding: var(--spacing-s);
    min-height: 50px;
  }
  
  .step::before {
    width: 24px;
    height: 24px;
    font-size: 0.75rem;
  }
  
  .course-row {
    flex-direction: column;
    gap: var(--spacing-s);
  }
  
  .input-field {
    width: 100%;
  }
}

/* Print Styles */
@media print {
  body {
    background-color: white;
  }
  
  .wizard-container {
    box-shadow: none;
    max-width: 100%;
    margin: 0;
    padding: 0;
  }
  
  .button-row, .progress-bar {
    display: none;
  }
  
  .grid-section {
    box-shadow: none;
  }
  
  .title {
    color: black;
  }
}
/* Notification styles - To be added to your main CSS file */
.notification {
  position: fixed;
  top: 20px;
  right: 20px;
  padding: 16px;
  border-radius: var(--radius-m);
  background-color: white;
  box-shadow: var(--elevation-2);
  min-width: 280px;
  max-width: 400px;
  z-index: 1000;
  transform: translateY(-20px);
  opacity: 0;
  transition: transform var(--transition-standard), opacity var(--transition-standard);
}

.notification.error {
  border-left: 4px solid var(--error);
}

.notification.info {
  border-left: 4px solid var(--primary);
}

.notification.success {
  border-left: 4px solid var(--secondary);
}

.notification-content {
  display: flex;
  align-items: center;
  gap: var(--spacing-m);
}

.notification i {
  font-size: 1.25rem;
}

.notification.error i {
  color: var(--error);
}

.notification.info i {
  color: var(--primary);
}

.notification.success i {
  color: var(--secondary);
}

@media (prefers-color-scheme: dark) {
  .notification {
    background-color: var(--surface);
    color: var(--on-surface);
  }
}