:root {
    --dark-bg: #1e1e1e;
    --dark-fg: #2c2c2c;
    --text-color: #f0f0f0;
    --accent-color: #64b5f6; /* Blue */
    --danger-color: #e57373; /* Red */
    --success-color: #81c784; /* Green */
    --border-color: #444;
    --radius: 8px;
    font-family: 'Vazirmatn', sans-serif;
}

body {
    background-color: var(--dark-bg);
    color: var(--text-color);
    margin: 0;
    padding: 20px 10px;
    display: flex;
    justify-content: center;
    font-size: 14px;
}

#app-container {
    width: 100%;
    max-width: 420px;
    background-color: var(--dark-fg);
    padding: 20px;
    border-radius: var(--radius);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
}

h1 {
    text-align: center;
    color: var(--accent-color);
    font-size: 1.5em;
    margin-bottom: 20px;
}

/* --- Input Fields and Buttons Styling --- */
input[type="text"], input[type="time"] {
    width: 100%;
    padding: 10px;
    margin-bottom: 10px;
    background-color: var(--dark-bg);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    border-radius: 5px;
    box-sizing: border-box;
    font-size: 0.9em;
    font-family: inherit;
}

input[type="time"]::-webkit-calendar-picker-indicator {
    filter: invert(1);
}

.input-row {
    display: flex;
    gap: 10px;
    margin-bottom: 5px;
}

.input-row > * {
    flex-grow: 1;
}

.btn {
    padding: 10px 15px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.1s;
    font-family: inherit;
    font-size: 0.9em;
    white-space: nowrap;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 5px; /* Spacing between icon and text */
}

.btn svg {
    width: 18px;
    height: 18px;
    stroke: currentColor; 
    stroke-width: 2;
    fill: none;
    flex-shrink: 0;
}

.btn-primary {
    background-color: var(--accent-color);
    color: var(--dark-bg);
    width: 100%;
    margin-top: 10px;
}

.btn-primary:hover {
    background-color: #4ba6f0;
}

.btn-danger {
    background-color: var(--danger-color);
    color: var(--text-color);
}

.btn-danger:hover {
    background-color: #d16363;
}

.btn-success {
    background-color: var(--success-color);
    color: var(--dark-bg);
}

.btn-success:hover {
    background-color: #70b973;
}

/* --- Radio Button Groups (Stylish Buttons) --- */
.radio-group {
    display: flex;
    justify-content: space-between;
    gap: 5px;
    margin-bottom: 15px;
    flex-wrap: wrap;
}

.radio-group label {
    flex-grow: 1;
    text-align: center;
    padding: 8px 5px;
    background-color: var(--dark-bg);
    border: 1px solid var(--border-color);
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.2s;
}

.radio-group input[type="radio"] {
    display: none;
}

.radio-group input[type="radio"]:checked + label {
    background-color: var(--accent-color);
    color: var(--dark-bg);
    border-color: var(--accent-color);
}

/* --- Table Styling --- */
.section-header {
    margin-top: 25px;
    margin-bottom: 10px;
    font-size: 1.1em;
    color: var(--accent-color);
    text-align: center;
}

#classes-table-container {
    background-color: var(--dark-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    overflow: hidden;
    margin-top: 15px;
    padding: 10px;
}

#classes-table {
    width: 100%;
    border-collapse: collapse;
    table-layout: fixed; 
}

#classes-table th, #classes-table td {
    padding: 8px;
    text-align: right;
    border-bottom: 1px solid var(--border-color);
    word-wrap: break-word; 
    vertical-align: middle; /* Ensures all content is vertically centered */
}

#classes-table th {
    background-color: #383838;
    color: var(--text-color);
    font-weight: bold;
    font-size: 0.85em;
}

#classes-table tbody tr:last-child td {
    border-bottom: none; 
}

#classes-table td {
    font-size: 0.9em;
}

/* Column Widths for better layout */
#classes-table th:nth-child(1), #classes-table td:nth-child(1) { width: 18%; } /* Day */
#classes-table th:nth-child(2), #classes-table td:nth-child(2) { width: 30%; } /* Time */
#classes-table th:nth-child(3), #classes-table td:nth-child(3) { width: 28%; } /* Course */
#classes-table th:nth-child(4), #classes-table td:nth-child(4) { width: 24%; } /* Actions */


.empty-table-message {
    text-align: center;
    padding: 20px;
    color: #aaa;
}

/* FIX: Aligning icon buttons */
.actions-cell {
    white-space: nowrap;
    display: flex;
    gap: 5px; 
    justify-content: flex-start;
    align-items: center; /* Crucial for vertical alignment */
    height: 100%; /* Important for vertical centering within the cell */
}

.actions-cell .btn {
    width: 30px; 
    height: 30px; 
    padding: 0;
    font-size: 0; 
    flex-shrink: 0; 
}

/* Adjust icon sizes within action buttons */
.actions-cell .btn svg {
    width: 16px;
    height: 16px;
    margin: 0;
}

/* Day Cell specific styling */
#classes-table td:nth-child(1) {
    vertical-align: top;
    padding-top: 15px; /* Adjust padding to look vertically centered relative to the first item */
}


/* --- Result Box Styling --- */
#result-box-container {
    margin-top: 25px;
    padding: 15px;
    background-color: var(--dark-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
}

#result-actions {
    display: flex;
    justify-content: flex-end;
    gap: 5px;
    margin-bottom: 10px;
}

#result-actions .btn {
    padding: 5px 10px;
    font-size: 0.8em;
}
#result-actions .btn svg {
    width: 16px;
    height: 16px;
    margin-left: 5px; 
}

#result-output {
    white-space: pre-wrap;
    font-size: 0.9em;
    min-height: 50px;
    padding: 10px;
    border: 1px dashed var(--border-color);
    border-radius: 5px;
    background-color: #111;
}

/* --- Modal Styling --- */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(5px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background-color: var(--dark-fg);
    padding: 20px;
    border-radius: var(--radius);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.8);
    max-width: 300px;
    width: 90%;
    text-align: center;
}

.modal-content p {
    margin-bottom: 20px;
    font-size: 1.1em;
}

.modal-actions {
    display: flex;
    justify-content: space-around;
    gap: 10px;
}

.modal-actions .btn {
    flex-grow: 1;
}

/* --- Toast Styling --- */
#toast-container {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 1050;
}

.toast {
    padding: 12px 18px;
    border-radius: 5px;
    margin-bottom: 10px;
    opacity: 0;
    transition: opacity 0.3s, transform 0.3s;
    transform: translateY(20px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.4);
    font-size: 0.9em;
}

.toast.show {
    opacity: 1;
    transform: translateY(0);
}

.toast-success {
    background-color: var(--success-color);
    color: var(--dark-bg);
}

.toast-error {
    background-color: var(--danger-color);
    color: var(--text-color);
}