/* GENERAL PAGE STYLE */
body {
    font-family: Arial, sans-serif;
    background: #eeedf9;
    margin: 0;
    padding: 0;
}

/* CENTERED CONTENT WRAPPER */
.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 30px;
}

/* PAGE TITLE */
h1 {
    text-align: center;
    font-size: 35px;
    margin-bottom: 40px;
}

/* BLOCK SECTIONS */
.block {
    background: white;
    padding: 20px 25px;
    margin-bottom: 30px;
    border-radius: 8px;
    border: 1px solid #ddd;
}

/* FIELDSET TITLE */
legend {
    font-size: 24px;
    font-weight: bold;
    margin-bottom: 10px;
}

/* LABEL STYLING */
.block label {
    font-size: 18px;
    font-weight: 600;
    margin-top: 15px;
    margin-bottom: 5px;
    display: block;
    color: #333;
}


/* INPUT FIELDS */
.block input {
    display: block;
    padding: 10px;
    width: 300px;
    font-size: 18px;
    margin-top: 6px;
    margin-bottom: 15px;
    border-radius: 5px;
    border: 1px solid #ccc;
}

/* BUTTONS */
button {
    padding: 8px 16px;
    font-size: 18px;
    border-radius: 6px;
    border: none;
    background: #574a94;
    color: white;
    cursor: pointer;
    margin-top: 10px;
}

button:hover {
    background: #574a94;
}

/* LIST TITLES */
.list-title {
    margin-top: 15px;
    font-size: 20px;
    font-weight: bold;
}

/* LIST BOXES */
.list-box {
    background: #f5f3fc;
    padding: 15px;
    min-height: 50px;
    border-radius: 5px;
    border: 1px solid #ccc;
    font-size: 20px;
}

#add-course-btn {
    display: block;
    margin-top: 15px;
}

/* SELECT DROPDOWNS */
.block select {
    display: block;
    padding: 10px;
    width: 320px;
    font-size: 18px;
    margin-top: 6px;
    margin-bottom: 15px;
    border-radius: 5px;
    border: 1px solid #ccc;
    background: white;
    cursor: pointer;
}


/* SOLVE BUTTON */
#solve-btn {
    width: 100%;
    font-size: 22px;
    padding: 14px;
    margin-top: 30px;
}

/* STATUS DISPLAY */
#status {
    margin-top: 25px;
    font-size: 22px;
    font-weight: bold;
    text-align: center;
}

/* TIMETABLE GRID */
#timetable-grid {
    margin-top: 25px;
    padding: 20px;
    background: white;
    border-radius: 8px;
    border: 1px solid #ddd;
}

/* TABLE STYLE */
table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 10px;
}

#timetable-grid {
    overflow-x: auto;
}

#timetable-grid table {
    margin: 0 auto;
}


#timetable-grid table th,
#timetable-grid table td {
    white-space: nowrap;
}


td, th {
    border: 1px solid #bbb;
    padding: 10px;
    text-align: center;
    font-size: 17px;
}

th {
    background: #eeedf9;
    font-weight: bold;
}

.hidden {
    display: none;
}

/* EXPLANATION PANEL */
#explanations {
    margin-top: 25px;
    background: #ffffff;
    border: 1px solid #ddd;
    border-radius: 8px;
    padding: 20px;
}

#explanations h3 {
    margin-top: 0;
    font-size: 22px;
    color: #333;
    font-weight: bold;
}

#explanations ol {
    padding-left: 20px;
    margin-top: 10px;
}

#explanations li {
    margin: 6px 0;
    font-size: 18px;
    line-height: 1.4;
}