/* --- Base Styles --- */
:root {
    --bg-color: #f0f0f0;
    --text-color: #333;
    --header-bg: #e7f1ff;
    --table-border: #ddd;
    --table-bg: #fff;
    --table-alt-bg: #e9ecef;
    --input-bg: #fff;
    --input-border: #ced4da;
    --footer-bg: #f5f5f5;
    --delete-color: #ff4444;
    --invalid-color: #dc3545;
}

[data-theme="dark"] {
    --bg-color: #1a1a2e;
    --text-color: #e6e6e6;
    --header-bg: #16213e;
    --table-border: #2d4059;
    --table-bg: #0f3460;
    --table-alt-bg: #16213e;
    --input-bg: #2d4059;
    --input-border: #3a506b;
    --footer-bg: #16213e;
    --delete-color: #ff6b6b;
    --invalid-color: #ff6b6b;
}

body {
    font-family: 'Space Grotesk', Arial, sans-serif;
    padding: 20px;
    max-width: 100%;
    overflow-x: auto;
    background-color: var(--bg-color);
    color: var(--text-color);
    padding-bottom: 50px;
    transition: background-color 0.3s ease;
}

/* --- Header Section --- */
#header-section {
    margin-bottom: 20px;
    padding: 15px;
    background-color: var(--header-bg);
    border-radius: 5px;
    transition: background-color 0.3s ease;
}

.header-input {
    margin-right: 15px;
    margin-bottom: 10px;
    width: 200px;
}

/* --- Table Styles (Narrow Version) --- */
#blueprintTable {
    width: auto;
    max-width: 100%;
    margin: 20px 0;
    border-collapse: collapse;
    font-size: 16px;
    background-color: var(--table-bg);
    transition: background-color 0.3s ease;
}

#blueprintTable th, 
#blueprintTable td {
    padding: 4px 6px;
    border: 1px solid var(--table-border);
    text-align: center;
    min-width: 60px;
    width: 60px;
    vertical-align: middle;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

#blueprintTable th:first-child,
#blueprintTable td:first-child {
    width: 300px;
    text-align: left;
    min-width: 300px;
}

/* Chapter name cell */
.chapter-name-cell {
    width: 300px;
    min-width: 300px;
    max-width: 300px;
}

/* Mark input cells */
.mark-input-cell {
    width: 60px;
    min-width: 60px;
    max-width: 60px;
}

/* Total columns */
.chapter-total-cell,
.category-total-cell {
    width: 100px;
    min-width: 100px;
}

/* Input styles */
.form-control {
    padding: 2px 5px;
    height: 24px;
    font-size: 16px;
    width: 100%;
    box-sizing: border-box;
    background-color: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: 0.25rem;
    color: var(--text-color);
    transition: all 0.3s ease;
}

/* Header input styling */
#examName,
#subject,
#class,
#year {
    border: 2px solid var(--invalid-color);
    padding: 4px 8px;
    background-color: var(--input-bg);
    color: var(--text-color);
    transition: all 0.3s ease;
}

/* Chapter name input */
.chapter-name-input {
    width: calc(100% - 20px); /* Account for delete icon */
}

/* Mark value inputs */
.mark-input-container {
    position: relative;
    width: 80px;
    margin: 0 auto;
}

.mark-input {
    width: 100%;
    padding: 0.3rem 1.5rem 0.3rem 0.3rem;
    font-size: 1rem;
    text-align: center;
    border: 2px solid var(--table-border);
    border-radius: 4px;
    transition: all 0.3s ease;
    background-color: var(--input-bg);
    color: var(--text-color);
}

.mark-input:focus {
    border-color: var(--table-border);
    box-shadow: 0 0 0 2px rgba(74,144,226,0.2);
    outline: none;
}

.mark-input:hover {
    border-color: var(--input-border);
}

.mark-clear-btn {
    position: absolute;
    right: 5px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-color);
    opacity: 0.7;
    cursor: pointer;
    font-size: 1rem;
    padding: 0 3px;
    transition: all 0.3s ease;
}

.mark-clear-btn:hover {
    color: var(--delete-color);
    opacity: 1;
}

/* Validation states */
.mark-input.valid {
    border-color: #28a745;
}

.mark-input.invalid {
    border-color: var(--invalid-color);
}

/* Delete icons */
.delete-icon {
    cursor: pointer;
    color: var(--delete-color);
    margin-left: 5px;
    font-size: 14px;
    font-weight: bold;
    transition: color 0.3s ease;
}

.delete-icon:hover {
    opacity: 0.8;
}

/* --- Control Buttons --- */
.control-button {
    padding: 6px 12px;
    margin: 5px;
    font-size: 12px;
}

/* --- Footer Totals --- */
#blueprintTable tfoot td {
    font-weight: bold;
    background-color: var(--footer-bg);
    transition: background-color 0.3s ease;
}

/* --- Responsive Adjustments --- */
@media (max-width: 768px) {
    .header-input {
        width: 100%;
        margin-right: 0;
    }
    
    #blueprintTable {
        font-size: 14px;
    }
    
    #blueprintTable th, 
    #blueprintTable td {
        padding: 3px 4px;
    }
}

/* --- Validation States --- */
.is-invalid {
    border-color: var(--invalid-color) !important;
}

.invalid-feedback {
    color: var(--invalid-color);
    font-size: 80%;
}

/* Zebra striping */
#blueprintTable tbody tr:nth-child(odd) td {
    background-color: var(--table-alt-bg);
    transition: background-color 0.3s ease;
}

#blueprintTable tbody tr:nth-child(odd) input[type="text"],
#blueprintTable tbody tr:nth-child(odd) input[type="number"] {
    background-color: var(--input-bg);
}

/* Hide spinner buttons on number inputs */
#blueprintTable input[type=number]::-webkit-inner-spin-button,
#blueprintTable input[type=number]::-webkit-outer-spin-button {
    -webkit-appearance: none;
    margin: 0;
}
#blueprintTable input[type=number] {
    -moz-appearance: textfield;
}