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

body {
    font-family: 'Noto Sans Khmer', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
    display: flex;
    justify-content: center;
    align-items: flex-start;
}

.container {
    max-width: 1200px;
    width: 100%;
    background: white;
    border-radius: 15px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

/* Header Styles */
header {
    background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
    color: white;
    text-align: center;
    padding: 40px 20px;
}

header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.subtitle {
    font-size: 1.2rem;
    opacity: 0.9;
    font-weight: 400;
}

/* Navigation Styles */
.navigation {
    display: flex;
    background: #f8f9fa;
    border-bottom: 2px solid #e9ecef;
    overflow-x: auto;
}

.nav-btn {
    flex: 1;
    padding: 20px;
    background: transparent;
    border: none;
    font-family: 'Noto Sans Khmer', Arial, sans-serif;
    font-size: 1.1rem;
    font-weight: 600;
    color: #666;
    cursor: pointer;
    transition: all 0.3s ease;
    border-bottom: 3px solid transparent;
    white-space: nowrap;
}

.nav-btn:hover {
    background: #e9ecef;
    color: #333;
}

.nav-btn.active {
    background: white;
    color: #667eea;
    border-bottom-color: #667eea;
}

/* Section Styles */
.section {
    display: none;
    padding: 40px;
}

.section.active {
    display: block;
}

/* Main Content */
.input-section, .result-section, .lookup-table, .formula-info,
.time-input-section, .time-result-section, .time-tables, .filter-section, .results-summary {
    margin-bottom: 40px;
    padding: 30px;
    background: #f8f9fa;
    border-radius: 10px;
    border-left: 5px solid #667eea;
}

h2 {
    color: #2c3e50;
    font-size: 1.8rem;
    margin-bottom: 20px;
    font-weight: 600;
}

h3 {
    color: #34495e;
    font-size: 1.4rem;
    margin-bottom: 15px;
    font-weight: 600;
}

/* Input Section */
.input-group {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

label {
    font-weight: 600;
    color: #555;
    font-size: 1.1rem;
}

input[type="number"], input[type="time"] {
    padding: 15px;
    border: 2px solid #ddd;
    border-radius: 8px;
    font-size: 1.1rem;
    font-family: 'Noto Sans Khmer', Arial, sans-serif;
    transition: border-color 0.3s ease;
}

input[type="number"]:focus, input[type="time"]:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

button {
    padding: 15px 30px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    font-family: 'Noto Sans Khmer', Arial, sans-serif;
}

button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.3);
}

button:active {
    transform: translateY(0);
}

/* Result Section */
.result-display, .time-result-display {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.result-item, .time-result-item {
    background: white;
    padding: 20px;
    border-radius: 8px;
    border: 2px solid #e9ecef;
    text-align: center;
    transition: transform 0.2s ease;
}

.result-item:hover, .time-result-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.label {
    display: block;
    font-weight: 600;
    color: #666;
    margin-bottom: 10px;
    font-size: 1rem;
}

.value {
    display: block;
    font-size: 1.3rem;
    font-weight: 700;
    color: #2c3e50;
    word-break: break-word;
}

/* Table Styles */
table {
    width: 100%;
    border-collapse: collapse;
    background: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    margin-bottom: 30px;
}

.time-table {
    font-size: 0.95rem;
}

thead {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

th {
    padding: 15px 10px;
    text-align: center;
    font-weight: 600;
    font-size: 1rem;
}

td {
    padding: 12px 10px;
    text-align: center;
    border-bottom: 1px solid #e9ecef;
    font-size: 0.95rem;
    word-break: break-word;
}

tbody tr {
    transition: all 0.3s ease;
}

tbody tr:hover {
    background-color: #f1f3f4;
}

tbody tr.highlighted {
    background-color: #fff3cd;
    transform: scale(1.01);
    box-shadow: 0 4px 12px rgba(255, 193, 7, 0.3);
}

tbody tr:nth-child(even) {
    background-color: #f8f9fa;
}

tbody tr.highlighted:nth-child(even) {
    background-color: #fff3cd;
}

/* Color coding for positive and negative results */
tbody tr.highlighted.negative-result {
    background-color: #ffebee;
    border-left: 5px solid #e74c3c;
    box-shadow: 0 4px 12px rgba(231, 76, 60, 0.3);
}

tbody tr.highlighted.negative-result:nth-child(even) {
    background-color: #ffebee;
}

tbody tr.highlighted.positive-result {
    background-color: #e8f5e8;
    border-left: 5px solid #27ae60;
    box-shadow: 0 4px 12px rgba(39, 174, 96, 0.3);
}

tbody tr.highlighted.positive-result:nth-child(even) {
    background-color: #e8f5e8;
}

/* Time Tables Container */
.time-tables {
    background: transparent;
    border: none;
    padding: 0;
}

.time-table-container {
    margin-bottom: 40px;
    padding: 25px;
    background: #f8f9fa;
    border-radius: 10px;
    border-left: 5px solid #28a745;
}

.time-table-container:last-child {
    margin-bottom: 0;
}

.time-table-container h3 {
    color: #28a745;
    margin-bottom: 20px;
    font-size: 1.3rem;
}

/* Formula Section */
.formula {
    background: #2c3e50;
    color: white;
    padding: 20px;
    border-radius: 8px;
    margin: 15px 0;
    font-family: 'Courier New', monospace;
    font-size: 1.1rem;
    text-align: center;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.2);
}

.formula-explanation {
    color: #666;
    font-style: italic;
    margin-top: 15px;
    line-height: 1.7;
}

/* Filter Controls */
.filter-controls {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 20px;
    align-items: end;
}

.filter-controls .filter-group {
    display: flex;
    flex-direction: column;
}

.filter-controls label {
    display: block;
    font-weight: bold;
    margin-bottom: 8px;
    color: #374151;
    font-size: 16px;
}

.filter-controls select,
.filter-controls button {
    width: 100%;
    padding: 12px;
    border: 2px solid #d1d5db;
    border-radius: 8px;
    font-size: 16px;
    background: white;
    transition: border-color 0.3s ease;
    height: 48px;
    margin-top: auto;
}

.filter-controls select:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 5px rgba(102, 126, 234, 0.3);
}

.filter-controls .show-all-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    font-family: 'Noto Sans Khmer', Arial, sans-serif;
}

.filter-controls .show-all-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.3);
}

/* Results Summary */
.results-summary {
    background: #e0f2fe;
    border-left-color: #03a9f4;
}

.results-summary h3 {
    color: #0277bd;
    margin-bottom: 15px;
}

/* Filter Data Table */
.filter-section table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

.filter-section th,
.filter-section td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid #e5e7eb;
}

.filter-section th {
    background-color: #f3f4f6;
    font-weight: bold;
    color: #374151;
}

.filter-section tr:hover {
    background-color: #f9fafb;
}

.filter-section .highlighted {
    background-color: #fef3c7 !important;
    border: 2px solid #f59e0b;
    font-weight: bold;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        margin: 10px;
        border-radius: 10px;
    }
    
    header {
        padding: 30px 20px;
    }
    
    header h1 {
        font-size: 2rem;
    }
    
    .subtitle {
        font-size: 1rem;
    }
    
    .section {
        padding: 20px;
    }
    
    .input-section, .result-section, .lookup-table, .formula-info,
    .time-input-section, .time-result-section {
        padding: 20px;
        margin-bottom: 25px;
    }
    
    .time-table-container {
        padding: 20px;
        margin-bottom: 25px;
    }
    
    .result-display, .time-result-display {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    h2 {
        font-size: 1.5rem;
    }
    
    h3 {
        font-size: 1.2rem;
    }
    
    .input-group {
        gap: 12px;
    }
    
    input[type="number"], input[type="time"], button {
        padding: 12px;
        font-size: 1rem;
    }
    
    .nav-btn {
        padding: 15px 10px;
        font-size: 1rem;
    }
    
    th, td {
        padding: 10px 5px;
        font-size: 0.9rem;
    }
    
    .formula {
        font-size: 1rem;
        padding: 15px;
    }
    
    .value {
        font-size: 1.2rem;
    }
    
    table {
        font-size: 0.85rem;
    }
    
    .filter-controls {
        grid-template-columns: 1fr;
    }
    
    .filter-controls select {
        font-size: 14px;
        padding: 10px;
    }
}

@media (max-width: 480px) {
    body {
        padding: 10px;
    }
    
    header h1 {
        font-size: 1.8rem;
    }
    
    .subtitle {
        font-size: 0.9rem;
    }
    
    .section {
        padding: 15px;
    }
    
    .input-section, .result-section, .lookup-table, .formula-info,
    .time-input-section, .time-result-section {
        padding: 15px;
        margin-bottom: 20px;
    }
    
    .time-table-container {
        padding: 15px;
        margin-bottom: 20px;
    }
    
    h2 {
        font-size: 1.3rem;
    }
    
    h3 {
        font-size: 1.1rem;
    }
    
    .nav-btn {
        padding: 12px 8px;
        font-size: 0.9rem;
    }
    
    th, td {
        padding: 8px 4px;
        font-size: 0.8rem;
    }
    
    .value {
        font-size: 1.1rem;
    }
    
    .result-item, .time-result-item {
        padding: 15px;
    }
}

/* Animation for page load */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.container {
    animation: fadeIn 0.8s ease-out;
}

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}

/* Custom scrollbar for navigation */
.navigation::-webkit-scrollbar {
    height: 4px;
}

.navigation::-webkit-scrollbar-track {
    background: #f1f1f1;
}

.navigation::-webkit-scrollbar-thumb {
    background: #667eea;
    border-radius: 2px;
}

.navigation::-webkit-scrollbar-thumb:hover {
    background: #5a6fd8;
}