:root {
--primary-color: #f7c810;
--secondary-color: #5060c7;
--accent-color: #ff6b6b;
--theme-color: #5060c7;
--text-color: #333;
--text-light: #666;
--light-gray: #f5f5f5;
--medium-gray: #e0e0e0;
--completed-color: #4caf50;
--border-radius: 12px;
--shadow: 0 4px 12px rgba(0,0,0,0.1);
--transition: all 0.3s ease;
--font-base: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

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

.header {
  margin: 0;
}

.container {

  max-width: 1300px;
  margin: 0 auto;
  padding: 30px;
  padding-top: 20px;
}

.header-section {
display: flex;
justify-content: space-between;
align-items: center;
margin-bottom: 40px;
flex-wrap: wrap;
}

.logo {
display: flex;
align-items: center;
font-size: 26px;
font-weight: bold;
}

.logo img {
width: 45px;
margin-right: 12px;
}

h1 {
font-size: 36px;
margin-bottom: 30px;
color: var(--theme-color);
text-align: center;
border-bottom: 4px solid var(--primary-color);
padding-bottom: 15px;
letter-spacing: 0.5px;
}

/* Calendar and date selector styles */
.date-selector {
background-color: white;
padding: 30px;
border-radius: var(--border-radius);
box-shadow: var(--shadow);
margin-bottom: 40px;
transition: var(--transition);
}

.date-selector:hover {
box-shadow: 0 6px 16px rgba(0,0,0,0.15);
}

.date-selector form {
display: flex;
flex-wrap: wrap;
align-items: center;
gap: 25px;
justify-content: center;
}

.date-selector label {
font-weight: bold;
margin-right: 10px;
font-size: 18px;
color: var(--theme-color);
}

.date-selector input[type="date"] {
padding: 12px 15px;
border: 2px solid var(--medium-gray);
border-radius: 8px;
font-size: 16px;
transition: var(--transition);
width: 200px;
}

.date-selector input[type="date"]:focus {
border-color: var(--primary-color);
outline: none;
box-shadow: 0 0 0 3px rgba(247, 200, 16, 0.2);
}

.date-selector button {
background-color: var(--primary-color);
color: var(--text-color);
border: none;
padding: 12px 25px;
border-radius: 8px;
cursor: pointer;
font-weight: bold;
font-size: 16px;
transition: var(--transition);
box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.date-selector button:hover {
background-color: #f5c000;
transform: translateY(-2px);
box-shadow: 0 4px 8px rgba(0,0,0,0.15);
}

.date-selector button:active {
transform: translateY(0);
}

/* Month and week containers */
.month-container {
margin-bottom: 50px;
transition: var(--transition);
}

.month-header {
background: linear-gradient(135deg, var(--theme-color), #4050b5);
color: white;
padding: 20px 25px;
border-radius: var(--border-radius) var(--border-radius) 0 0;
display: flex;
justify-content: space-between;
align-items: center;
box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.month-header h2 {
margin: 0;
font-size: 26px;
font-weight: 600;
letter-spacing: 0.5px;
color: white;
border-bottom: 2px solid #F5C000;
}

.weeks-container {
background-color: white;
border-radius: 0 0 var(--border-radius) var(--border-radius);
box-shadow: var(--shadow);
overflow: hidden;
}

.week {
border-bottom: 1px solid var(--medium-gray);
padding: 25px;
transition: var(--transition);
}

.week:hover {
background-color: rgba(245, 245, 245, 0.5);
}

.week:last-child {
border-bottom: none;
}

.week.week-completed {
background: linear-gradient(135deg, rgba(76, 175, 80, 0.25) 0%, rgba(139, 195, 74, 0.15) 100%);
border-left: 4px solid var(--completed-color);
}

.week.week-completed:hover {
background: linear-gradient(135deg, rgba(76, 175, 80, 0.35) 0%, rgba(139, 195, 74, 0.25) 100%);
}

.week-header {
display: flex;
justify-content: space-between;
align-items: center;
margin-bottom: 20px;
padding-bottom: 15px;
border-bottom: 1px solid var(--medium-gray);
}

.week-dates {
display: flex;
flex-direction: column;
}

.week-number {
font-size: 24px;
font-weight: bold;
margin-bottom: 6px;
color: var(--theme-color);
}

.date-range {
font-size: 16px;
color: var(--text-light);
}

.week-progress {
color: var(--theme-color);
font-weight: 600;
font-size: 18px;
display: flex;
align-items: center;
gap: 8px;
}

.week-progress i {
font-size: 20px;
}

.progress-container {
width: 120px;
height: 10px;
background-color: var(--light-gray);
border-radius: 10px;
overflow: hidden;
margin-left: 8px;
}

.progress-bar {
height: 100%;
background-color: var(--primary-color);
border-radius: 10px;
transition: width 0.5s ease;
min-width: 0;
}

/* Lessons grid and cards */
.lessons-grid {
display: grid;
grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
gap: 20px;
}

.lesson-card {
position: relative;
background-color: white;
border-left: 5px solid var(--primary-color);
padding: 20px;
border-radius: 10px;
box-shadow: 0 3px 10px rgba(0,0,0,0.08);
transition: var(--transition);
cursor: pointer;
min-height: 180px;
display: flex;
flex-direction: column;
}

.lesson-card:hover {
transform: translateY(-5px);
box-shadow: 0 8px 25px rgba(0,0,0,0.1);
}

.lesson-card.completed {
border-left: 5px solid var(--completed-color);
}

.lesson-title {
font-size: 18px;
margin-bottom: 10px;
color: var(--text-color);
line-height: 1.4;
}

.lesson-description {
font-size: 15px;
color: var(--text-light);
margin-bottom: 20px;
flex-grow: 1;
}

.lesson-meta {
display: flex;
align-items: center;
gap: 8px;
margin-bottom: 15px;
font-size: 14px;
color: var(--text-light);
}

.lesson-meta i {
color: var(--primary-color);
}

.start-button {
display: inline-block;
background-color: var(--primary-color);
color: var(--text-color);
padding: 10px 18px;
border-radius: 8px;
text-decoration: none;
font-size: 15px;
font-weight: 600;
transition: var(--transition);
text-align: center;
box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.start-button:hover {
background-color: #f5c000;
color: var(--text-color);
transform: translateY(-2px);
box-shadow: 0 4px 8px rgba(0,0,0,0.15);
}

.lesson-footer {
display: flex;
justify-content: flex-end;
margin-top: auto;
flex-direction: column;
}

.completion-badge {
background-color: var(--completed-color);
color: white;
padding: 10px 18px;
border-radius: 8px;
font-size: 15px;
display: flex;
align-items: center;
gap: 8px;
font-weight: 600;
box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.completion-badge i {
font-size: 16px;
}

.no-lessons-message {
grid-column: 1 / -1;
padding: 40px;
text-align: center;
color: var(--text-color);
background-color: #f9f9f9;
border-radius: 12px;
box-shadow: var(--shadow);
margin: 20px 0;
border: 2px dashed var(--primary-color);
}

.no-lessons-message i {
font-size: 54px;
color: var(--primary-color);
margin-bottom: 20px;
}

.no-lessons-message h3 {
font-size: 22px;
margin-bottom: 15px;
color: var(--theme-color);
}

.no-lessons-message p {
font-size: 16px;
line-height: 1.6;
max-width: 600px;
margin: 0 auto;
color: var(--text-light);
}

/* Loading indicator */
.loading-container {
text-align: center;
padding: 40px;
background-color: #f9f9f9;
border-radius: 12px;
box-shadow: var(--shadow);
margin: 20px 0;
}

.loading-container p {
font-size: 16px;
margin-top: 20px;
color: var(--theme-color);
}

.loading-spinner {
display: inline-block;
width: 60px;
height: 60px;
border: 4px solid var(--light-gray);
border-radius: 50%;
border-top-color: var(--primary-color);
animation: spin 1s ease-in-out infinite;
}

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

/* Responsive styles */
@media (max-width: 992px) {
.container {
padding: 20px;
}

h1 {
font-size: 30px;
}

.month-header h2 {
font-size: 22px;
}

.week {
padding: 20px;
}

.lessons-grid {
grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
gap: 15px;
}
}

@media (max-width: 768px) {
.header-section {
flex-direction: column;
gap: 15px;
}

.date-selector form {
flex-direction: column;
align-items: stretch;
}

.date-selector input[type="date"] {
width: 100%;
}

.week-header {
flex-direction: column;
align-items: flex-start;
gap: 10px;
}

.lessons-grid {
grid-template-columns: 1fr;
}

.week-number {
font-size: 20px;
}

.date-range {
font-size: 14px;
}
}

@media (max-width: 480px) {
.container {
padding: 15px;
}

h1 {
font-size: 24px;
}

.date-selector {
padding: 20px;
}

.month-header h2 {
font-size: 20px;
}

.week {
padding: 15px;
}

.lesson-card {
padding: 15px;
}
}

/* Date selector introduction styles */
.date-selector-intro {
text-align: center;
margin-bottom: 25px;
}

.date-selector-intro i {
font-size: 36px;
color: var(--primary-color);
margin-bottom: 10px;
}

.date-selector-intro h3 {
font-size: 22px;
color: var(--theme-color);
margin-bottom: 8px;
}

.date-selector-intro p {
color: var(--text-light);
font-size: 16px;
max-width: 600px;
margin: 0 auto;
}

/* Form layout improvements */
.date-selector form > div {
display: flex;
flex-direction: column;
}

.date-selector label {
margin-bottom: 8px;
margin-right: 0;
}

.date-help {
font-size: 14px;
color: var(--text-light);
margin-top: 5px;
}

/* Enhanced Calendar Styling */

/* Calendar container - make it larger and add a subtle shadow */
.ui-datepicker,
[class*="datepicker"] {
  font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  width: 320px !important;
  padding: 15px !important;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.12) !important;
  border-radius: 12px !important;
  border: none !important;
  background-color: white !important;
  z-index: 100 !important;
}

/* Calendar header */
.ui-datepicker-header,
[class*="datepicker-header"] {
  background: linear-gradient(135deg, #5060c7, #4050b5) !important;
  border: none !important;
  border-radius: 8px !important;
  color: white !important;
  padding: 12px !important;
  margin-bottom: 10px !important;
}

/* Month/year dropdown styling */
.ui-datepicker select.ui-datepicker-month,
.ui-datepicker select.ui-datepicker-year,
[class*="datepicker"] select {
  font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif !important;
  font-size: 16px !important;
  font-weight: 500 !important;
  padding: 5px 8px !important;
  margin: 0 5px !important;
  border-radius: 6px !important;
  border: 1px solid rgba(255, 255, 255, 0.3) !important;
  background-color: rgba(255, 255, 255, 0.1) !important;
  color: white !important;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1) !important;
  width: auto !important;
}

/* Previous/Next buttons */
.ui-datepicker .ui-datepicker-prev,
.ui-datepicker .ui-datepicker-next,
[class*="datepicker"] [class*="prev"],
[class*="datepicker"] [class*="next"] {
  background-color: rgba(255, 255, 255, 0.15) !important;
  border-radius: 50% !important;
  cursor: pointer !important;
  width: 30px !important;
  height: 30px !important;
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
  top: 10px !important;
  transition: background-color 0.2s ease !important;
}

.ui-datepicker .ui-datepicker-prev:hover,
.ui-datepicker .ui-datepicker-next:hover,
[class*="datepicker"] [class*="prev"]:hover,
[class*="datepicker"] [class*="next"]:hover {
  background-color: rgba(255, 255, 255, 0.25) !important;
}

/* Day names (Mo, Tu, etc.) */
.ui-datepicker th,
[class*="datepicker"] th {
  font-weight: 600 !important;
  font-size: 14px !important;
  color: #5060c7 !important;
  text-transform: uppercase !important;
  padding: 10px 5px !important;
  border-bottom: 1px solid #f0f0f0 !important;
}

/* Calendar days */
.ui-datepicker td,
[class*="datepicker"] td {
  padding: 2px !important;
}

.ui-datepicker td span,
.ui-datepicker td a,
[class*="datepicker"] td span,
[class*="datepicker"] td a {
  text-align: center !important;
  font-size: 15px !important;
  padding: 10px !important;
  border-radius: 8px !important;
  transition: all 0.2s ease !important;
  border: none !important;
  background: none !important;
  color: #333 !important;
  width: 36px !important;
  height: 36px !important;
  line-height: 16px !important;
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
  margin: 0 auto !important;
}

/* Hover state */
.ui-datepicker td a:hover,
[class*="datepicker"] td a:hover {
  background-color: #f5f5f5 !important;
  color: #5060c7 !important;
}

/* Selected day */
.ui-datepicker td a.ui-state-active,
.ui-datepicker td a.ui-state-highlight,
[class*="datepicker"] td a.selected,
[class*="datepicker"] td a.highlighted,
[class*="datepicker"] td.selected {
  background-color: #f7c810 !important;
  color: #333 !important;
  font-weight: bold !important;
}

/* Today's date */
.ui-datepicker td.ui-datepicker-today a,
[class*="datepicker"] td.today a {
  background-color: rgba(80, 96, 199, 0.1) !important;
  color: #5060c7 !important;
  font-weight: bold !important;
  box-shadow: inset 0 0 0 1px #5060c7 !important;
}

/* Bottom buttons styling */
.ui-datepicker .ui-datepicker-buttonpane,
[class*="datepicker-buttons"] {
  border-top: 1px solid #f0f0f0 !important;
  padding-top: 10px !important;
  margin-top: 10px !important;
  text-align: center !important;
  display: flex !important;
  justify-content: space-between !important;
}

.ui-datepicker .ui-datepicker-buttonpane button,
[class*="datepicker"] button {
  background-color: #5060c7 !important;
  color: white !important;
  border: none !important;
  padding: 8px 15px !important;
  border-radius: 6px !important;
  font-weight: 500 !important;
  font-size: 14px !important;
  cursor: pointer !important;
  transition: background-color 0.2s ease !important;
  font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif !important;
  margin: 0 5px !important;
}

.ui-datepicker .ui-datepicker-buttonpane button:hover,
[class*="datepicker"] button:hover {
  background-color: #4050b5 !important;
}

.ui-datepicker .ui-datepicker-buttonpane button.ui-datepicker-current,
[class*="datepicker"] button.today {
  background-color: #f7c810 !important;
  color: #333 !important;
}

/* Clear button */
button:contains("Clear") {
  background-color: #f5f5f5 !important;
  color: #666 !important;
}

/* Additional styling for the input fields */
input[type="date"] {
  font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif !important;
  font-size: 16px !important;
  padding: 14px 18px !important;
  border: 2px solid #e0e0e0 !important;
  border-radius: 10px !important;
  width: 230px !important;
  background-color: white !important;
  transition: all 0.3s ease !important;
  color: #333 !important;
}

input[type="date"]:hover {
  border-color: #d0d0d0 !important;
}

input[type="date"]:focus {
  border-color: #f7c810 !important;
  box-shadow: 0 0 0 3px rgba(247, 200, 16, 0.2) !important;
  outline: none !important;
}

/* Fix for mobile responsiveness */
@media (max-width: 768px) {
  .ui-datepicker,
  [class*="datepicker"] {
    width: 300px !important;
    left: 50% !important;
    transform: translateX(-50%) !important;
    position: fixed !important;
    top: 50% !important;
    transform: translate(-50%, -50%) !important;
  }
  
  input[type="date"] {
    width: 100% !important; 
  }
}

/* Media query adjustments for date selector */
@media (max-width: 768px) {
.date-selector-intro i {
    font-size: 30px;
}

.date-selector-intro h3 {
    font-size: 20px;
}
}

/* Locked lesson styles */
.lesson-card.lesson-locked {
    background-color: #f8f8f8;
    opacity: 0.7;
    position: relative;
}

.lesson-card.lesson-locked .lesson-title {
    color: #999;
}

.lesson-card.lesson-locked .lesson-description.locked {
    color: #aaa;
}

.lesson-card.lesson-locked:hover {
    transform: translateY(-2px); /* Less dramatic hover for locked cards */
}

/* Lock icon for timetable lessons */
.lesson-card .lock-icon {
    position: absolute;
    top: 10px;
    right: 10px;
    color: #999;
    font-size: 1.2rem;
    z-index: 10;
}

/* Locked button styles for timetable */
.lesson-card .start-button.locked-button {
    background: linear-gradient(135deg, #ff9800, #ff5722);
    color: white;
    text-decoration: none;
    font-weight: 500;
    padding: 10px 18px;
    border-radius: 8px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.3s ease;
    cursor: pointer;
}

.lesson-card .start-button.locked-button:hover {
    background: linear-gradient(135deg, #f57c00, #e64a19);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}