body {
    font-family: 'Arial', sans-serif;
    margin: 0;
    text-align: center;
    background-color: #f4f4f9;
    color: #333;
    padding-bottom: 80px; /* Add padding to account for sticky controls */
    scroll-behavior: smooth; /* Smooth scrolling for the whole page */
    overflow-x: hidden; /* Prevent horizontal scrolling */
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
    width: 100%;
    box-sizing: border-box;
}

header {
    background: linear-gradient(135deg, #0066cc, #004080);
    color: white;
    padding: 1.2rem 0;
    margin-bottom: 1.5rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    position: relative;
}

header h1 {
    margin: 0;
    font-size: 1.8rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.header-subtitle {
    margin: 5px 0 0 0;
    font-size: 1rem;
    opacity: 0.9;
    font-weight: 300;
}

.pre_image {
    display: flex;
    justify-content: center;
    position: relative;
    min-height: 100px;
    margin: 20px 0;
}

.timetable-container {
    background-color: white;
    padding: 10px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    font-family: 'Times New Roman', Times, serif;
    margin-bottom: 20px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch; /* Better scrolling on iOS */
    max-width: 100%;
    box-sizing: border-box;
}

.timetable {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
    min-width: 600px; /* Ensure minimum width for content */
}

.timetable th,
.timetable td {
    border: 1px solid #ddd;
    padding: 5px;
    text-align: center;
    max-width: 120px;
    white-space: normal;
    word-break: break-word;
    vertical-align: top;
    height: auto;
    min-height: 60px;
}

.timetable th {
    background-color: #0066cc;
    color: white;
    font-weight: bold;
    position: sticky;
    top: 0;
    z-index: 10;
}

.timetable tr:nth-child(even) {
    background-color: #f9f9f9;
}

.timetable td.time-slot {
    background-color: #f0f0f0;
    font-weight: bold;
    font-size: 0.8rem;
}

.timetable td.clash {
    background-color: #ff9696;
}

.course-cell {
    min-height: 45px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 3px;
    font-size: 0.85rem;
    gap: 3px; /* Add spacing between lines */
}

.course-code {
    font-weight: bold;
    color: #0066cc;
    /* Ensure course code is fully visible */
    word-break: keep-all;
    white-space: nowrap;
    overflow: visible;
    display: block; /* Make sure it's on its own line */
    width: 100%;
    text-align: center;
}

.course-name {
    font-size: 0.75rem;
    color: #333;
    display: block; /* Make sure it's on its own line */
    width: 100%;
    text-align: center;
    margin-top: 1px;
    margin-bottom: 1px;
}

.course-type {
    font-size: 0.75rem;
    color: #666;
    display: block; /* Make sure it's on its own line */
    width: 100%;
    text-align: center;
    margin-top: 1px;
}

.course-location {
    font-size: 0.7rem;
    color: #666;
    font-style: italic;
    display: block; /* Make sure it's on its own line */
    width: 100%;
    text-align: center;
    margin-top: 1px;
}

.course-clash {
    font-weight: bold;
    color: #ff0000;
    display: block;
    width: 100%;
    text-align: center;
    margin-top: 2px;
}

.course-clash-separator {
    color: #333;
    font-weight: normal;
}

.slot-code {
    font-family: monospace;
    font-size: 0.9rem;
    font-weight: bold;
    color: #555;
    display: block;
    text-align: center;
    padding: 5px 0;
}

/* Card styling for consistent UI elements */
.card {
    background-color: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
    margin: 20px 0;
    transition: all 0.3s ease;
}

.card:hover {
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.12);
}

/* Selected Courses Styling */
.selected-courses-container {
    background-color: #f0f7ff;
    border: 2px solid #0066cc;
    border-radius: 8px;
    padding: 15px;
    margin: 20px 0;
    box-shadow: 0 2px 8px rgba(0, 102, 204, 0.1);
}

.selected-courses-heading {
    color: #0066cc;
    margin: 0 0 15px 0;
    text-align: left;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
}

.selected-courses-list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: flex-start;
}

.selected-course-item {
    background-color: #0066cc;
    color: white;
    padding: 8px 12px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s ease;
    box-shadow: 0 2px 4px rgba(0, 102, 204, 0.2);
}

.selected-course-item:hover {
    background-color: #0056b3;
    transform: translateY(-1px);
    /* Q1RGezEwMGtfZCQkcF9pbl9jMGRlfQ== */
    box-shadow: 0 4px 8px rgba(0, 102, 204, 0.3);
}

.selected-course-code {
    font-weight: bold;
    font-family: monospace;
}

.selected-course-name {
    font-size: 0.85rem;
    opacity: 0.95;
}

.selected-course-credits {
    background-color: rgba(255, 255, 255, 0.2);
    padding: 2px 6px;
    border-radius: 10px;
    font-size: 0.8rem;
    margin-left: auto;
}

/* Remove course button styling */
.remove-course-btn {
    background: none;
    border: none;
    color: white;
    padding: 2px 4px;
    margin-left: 6px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    font-size: 0.8rem;
    width: 18px;
    height: 18px;
    opacity: 0.8;
}

.remove-course-btn:hover {
    background-color: rgba(255, 255, 255, 0.2);
    opacity: 1;
    transform: scale(1.1);
}

/* Enhanced controls styling */
.controls {
    display: flex;
    margin-top: 30px;
    padding: 15px;
    border-radius: 8px;
    background-color: white;
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.15);
    position: relative;
    z-index: 10;
    pointer-events: auto;
    transition: all 0.3s ease;
}

/* Simplified sticky controls */
.sticky-controls {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 100;
    /* margin: 0; */
    /* width: 100%; */
    border-radius: 0;
    padding: 10px 20px;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(5px);
    border-top: 1px solid rgba(0, 0, 0, 0.1);
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-sizing: border-box;
    width: 100%;
    flex-wrap: nowrap;
}

/* Left controls container with credit counter and go to top */
.left-controls {
    display: flex;
    align-items: center;
    gap: 15px;
}

.buttons-container {
    display: flex;
    justify-content: flex-end;
    gap: 15px;
    margin: 0;
}

/* Credit counter styling */
.credits-counter {
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #0066cc;
    color: white;
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 14px;
    gap: 5px;
    font-weight: bold;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.credits-counter span {
    font-size: 16px;
}

/* Simplified button styling */
button {
    padding: 10px 20px;
    font-size: 16px;
    cursor: pointer;
    border: none;
    border-radius: 25px;
    transition: all 0.3s ease;
    gap: 8px;
    font-weight: 500;
    display: flex;
    align-items: center;
    justify-content: center;
}

.primary-btn {
    background-color: #0066cc;
    color: white;
}

.primary-btn:hover {
    background-color: #0056b3;
}

.secondary-btn {
    background-color: #dc3545;
    color: white;
}

.secondary-btn:hover {
    background-color: #c82333;
}

/* Go to top button styling */
.goto-top-btn {
    background-color: #6c757d;
    color: white;
    padding: 5px 12px;
}

.goto-top-btn:hover {
    background-color: #5a6268;
}

/* Remove back-to-top button since we now have it in the sticky bar */
.back-to-top {
    display: none !important;
}

/* Search styling */
.search-container {
    position: relative;
    margin: 20px auto;
    max-width: 100%;
    width: 600px;
    box-sizing: border-box;
}

.search-icon {
    position: absolute;
    left: 15px;
    top: 35%;
    transform: translateY(-50%);
    color: #666;
}

#search-field {
    width: 100%;
    box-sizing: border-box;
    padding: 12px 12px 12px 40px;
    font-size: 16px;
    border: 1px solid #ddd;
    border-radius: 25px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    margin-bottom: 15px;
    max-width: 100%;
}

#search-field:focus {
    outline: none;
    border: 1px solid #0066cc;
    box-shadow: 0 2px 12px rgba(0, 102, 204, 0.15);
}

.loader {
    display: none;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 50px;
    height: 50px;
    border: 5px solid rgba(0, 102, 204, 0.3);
    border-radius: 50%;
    border-top-color: #0066cc;
    animation: spin 1s ease-in-out infinite;
}

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

.courses-heading {
    margin: 30px 0 15px;
    color: #0066cc;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 1.3rem;
}

.courses-table {
    width: 100%;
    margin: 20px 0;
    border-collapse: collapse;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    position: relative;
    z-index: 5;
    pointer-events: auto;
    table-layout: fixed;
    overflow-x: auto;
    display: block;
}

.courses-table th,
.courses-table td {
    border: 1px solid #ccc;
    padding: 12px;
    text-align: left;
}

.courses-table th {
    background-color: #0066cc;
    color: #ffffff;
}

.courses-table tr:nth-child(even) {
    background-color: #f9f9f9;
}

.courses-table tr:hover {
    background-color: #f0f7ff;
    cursor: pointer;
}

.courses-table tr {
    position: relative;
    z-index: 6;
}

.courses-table input[type="checkbox"] {
    transform: scale(1.5);
    cursor: pointer;
}

.course-checkbox-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    height: 100%;
    cursor: pointer;
    position: relative;
    z-index: 7;
}

/* Responsive columns for courses table */
.courses-table th:nth-child(1), 
.courses-table td:nth-child(1) {
    width: 20%;
}

.courses-table th:nth-child(2), 
.courses-table td:nth-child(2) {
    width: 60%;
}

.courses-table th:nth-child(3), 
.courses-table td:nth-child(3),
.courses-table th:nth-child(4), 
.courses-table td:nth-child(4) {
    width: 10%;
}

/* Enhanced download options */
.download-options {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin: 15px 0;
    background-color: white;
    padding: 15px;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    /* width: 100%; */
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
    transition: all 0.3s ease;
}

.download-options h3 {
    color: #0066cc;
    margin: 0 0 10px 0;
    font-size: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.download-options .ics-help {
    margin-top: 10px;
    font-size: 0.9rem;
    color: #555;
    text-align: center;
}

.download-options .ics-help a {
    color: #0066cc;
    text-decoration: underline;
}

.option-buttons {
    display: flex;
    justify-content: center;
    gap: 12px;
    width: 100%;
    flex-wrap: wrap;
}

.option-button {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 15px;
    border: none;
    border-radius: 25px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 15px;
    font-weight: 500;
    width: auto;
    min-width: 80px;
}

.option-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.option-button.image {
    background-color: #28a745;
    color: white;
}

.option-button.image:hover {
    background-color: #218838;
}

.option-button.excel {
    background-color: #217346;
    color: white;
}

.option-button.excel:hover {
    background-color: #1a5c38;
}

.option-button.csv {
    background-color: #f8991d;
    color: white;
}

.option-button.csv:hover {
    background-color: #e08e1c;
}
.option-button.ics {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.option-button.ics:hover {
    background: linear-gradient(135deg, #764ba2 0%, #667eea 100%);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.6);
}

.message-box {
    padding: 10px 20px;
    margin: 10px auto;
    border-radius: 4px;
    display: none;
    width: 80%;
    max-width: 600px;
}

.error {
    background-color: #f8d7da;
    border: 1px solid #f5c6cb;
    color: #721c24;
}

.success {
    background-color: #d4edda;
    border: 1px solid #c3e6cb;
    color: #155724;
}

footer {
    background-color: #000000;
    color: white;
    padding: 10px 0;
    display: flex;
    justify-content: space-around;
    align-items: center;
    flex-wrap: wrap;
    font-size: 14px;
    margin-top: 30px;
}

.footer-section {
    margin: 10px 20px;
    text-align: center;
}

.footer-section a {
    color: #64b2ff;
    text-decoration: none;
}

.footer-section a:hover {
    text-decoration: underline;
}

/* Responsive design improvements */
@media (max-width: 768px) {
    .btn-text {
        display: none;
    }
    
    button {
        padding: 12px;
        width: 40px;
        height: 40px;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    .sticky-controls {
        padding: 10px;
    }
    
    .left-controls {
        gap: 10px;
    }
    
    .buttons-container {
        gap: 10px;
    }
    
    .credits-counter {
        padding: 4px 8px;
        font-size: 12px;
    }
    
    .credits-counter span {
        font-size: 14px;
    }
    
    header h1 {
        font-size: 1.5rem;
    }
    
    .header-subtitle {
        font-size: 0.9rem;
    }
    
    .container {
        padding: 0 10px;
    }
    
    .courses-table {
        font-size: 14px;
    }
    
    .courses-table th, 
    .courses-table td {
        padding: 8px 5px;
    }
    
    /* Fix columns for mobile */
    .courses-table th:nth-child(1), 
    .courses-table td:nth-child(1) {
        width: 25%;
    }
    
    .courses-table th:nth-child(2), 
    .courses-table td:nth-child(2) {
        width: 45%;
    }
    
    .courses-table th:nth-child(3), 
    .courses-table td:nth-child(3),
    .courses-table th:nth-child(4), 
    .courses-table td:nth-child(4) {
        width: 15%;
    }
    
    /* Fix download options buttons */
    .option-buttons {
        flex-wrap: wrap;
    }
    
    .option-button {
        flex: 1 1 auto;
        min-width: 80px;
    }
}

@media (max-width: 480px) {
    .sticky-controls {
        padding: 8px 10px;
    }
    
    button {
        width: 36px;
        height: 36px;
        padding: 8px;
    }
    
    .left-controls {
        gap: 6px;
    }
    
    .buttons-container {
        gap: 6px;
    }
    
    header h1 {
        font-size: 1.3rem;
    }
    
    .header-subtitle {
        font-size: 0.8rem;
    }
    
    .container {
        padding: 0 8px;
    }
    
    /* Stack the courses table columns more efficiently */
    .courses-table th, 
    .courses-table td {
        padding: 6px 4px;
        font-size: 12px;
    }
    
    /* Further optimize column widths */
    .courses-table th:nth-child(1), 
    .courses-table td:nth-child(1) {
        width: 30%;
    }
    
    .courses-table th:nth-child(2), 
    .courses-table td:nth-child(2) {
        width: 40%;
    }
    
    .courses-table th:nth-child(3), 
    .courses-table td:nth-child(3),
    .courses-table th:nth-child(4), 
    .courses-table td:nth-child(4) {
        width: 15%;
    }
    
    .courses-heading {
        font-size: 1.1rem;
    }
    
    /* Fix footer on small screens */
    footer {
        flex-direction: column;
        padding: 15px 0;
    }
    
    .footer-section {
        margin: 5px 0;
    }
    
    /* More compact sticky controls */
    .sticky-controls {
        padding: 6px 8px;
    }
}

@media (max-width: 360px) {
    button {
        width: 32px;
        height: 32px;
        padding: 6px;
    }
    
    .sticky-controls {
        padding: 6px 5px;
    }
    
    .left-controls {
        gap: 5px;
    }
    
    .buttons-container {
        gap: 5px;
    }
    
    .credits-counter {
        padding: 3px 6px;
        font-size: 11px;
    }
    
    .credits-counter span {
        font-size: 12px;
    }
    
    /* Make courses table more compact */
    .courses-table th, 
    .courses-table td {
        padding: 5px 2px;
        font-size: 11px;
    }
}

@media print {
    header, .controls, .download-options, footer, button, #search-field, .sticky-controls, .back-to-top {
        display: none !important;
    }
    
    .timetable-container {
        box-shadow: none;
        padding: 0;
    }
    
    body {
        background-color: white;
    }
}