/* CSS for A-MCTS Visualization */
@import url('https://fonts.googleapis.com/css2?family=Jost:ital,wght@0,100..900;1,100..900&display=swap');
:root {
    
    /* Base colors */
    --clr-dark-a0: #000000;
    --clr-light-a0: #ffffff;

    /* Theme primary colors */
    --clr-primary-a0: #b5e6ec;
    --clr-primary-a10: #bee9ee;
    --clr-primary-a20: #c6ecf0;
    --clr-primary-a30: #ceeef2;
    --clr-primary-a40: #d7f1f4;
    --clr-primary-a50: #dff4f7;

    /* Theme surface colors */
    --clr-surface-a0: #121212;
    --clr-surface-a10: #282828;
    --clr-surface-a20: #3f3f3f;
    --clr-surface-a30: #575757;
    --clr-surface-a40: #717171;
    --clr-surface-a50: #8b8b8b;

    /* Theme tonal surface colors */
    --clr-surface-tonal-a0: #202424;
    --clr-surface-tonal-a10: #353838;
    --clr-surface-tonal-a20: #4b4e4e;
    --clr-surface-tonal-a30: #626565;
    --clr-surface-tonal-a40: #7a7d7d;
    --clr-surface-tonal-a50: #939595;

    /* Derived colors for specific UI elements */
    --clr-text-primary: var(--clr-light-a0);
    --clr-text-secondary: #d0d0d0;
    --clr-bg-body: var(--clr-surface-a0);
    --clr-bg-header: var(--clr-surface-tonal-a0);
    --clr-bg-panel: var(--clr-surface-a10);
    --clr-bg-input: var(--clr-surface-tonal-a10);
    --clr-border: var(--clr-surface-a30);
    --clr-accent: var(--clr-primary-a20);
    --clr-accent-hover: var(--clr-primary-a40);
    --clr-error: #ff6b6b;
    --clr-success: #4ad295;
    --clr-warning: #ffd166;

    /* Layout */
    --header-height: 70px;
    --sidebar-width: 320px;
    --border-radius: 8px;
    --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
    --transition: all 0.3s ease;
    
    /* Checkbox variables */
    --checkbox-size: 18px;
    --checkbox-border-radius: 4px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    scrollbar-color: var(--clr-primary-a20) var(--clr-surface-a40);

}

body {
    font-family: 'Jost', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--clr-bg-body);
    color: var(--clr-text-primary);
    line-height: 1.6;
}

/* Container */
.container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Header */
header {
    background-color: var(--clr-bg-header);
    padding: 1.2rem 2rem;
    border-bottom: 1px solid var(--clr-border);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    padding-top: 0.65rem;
    padding-bottom: 0.9rem;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-title h1 {
    color: var(--clr-primary-a30);
    font-size: 1.8rem;
    font-weight: 600;
    margin-bottom: 0.03rem;
}

.header-title p {
    color: var(--clr-text-secondary);
    font-size: 0.9rem;
}

.header-controls {
    display: flex;
    gap: 10px;
}

.btn-header {
    padding: 0.6rem 1.2rem;
    background-color: var(--clr-primary-a0);
    color: var(--clr-dark-a0);
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
}

.btn-header:hover {
    background-color: var(--clr-primary-a20);
}

/* Content Layout */
.content-wrapper {
    display: flex;
    flex: 1;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background-color: var(--clr-bg-panel);
    border-right: 1px solid var(--clr-border);
    padding: 1.5rem;
    overflow-y: auto;
}

/* Main Content */
.main-content {
    flex-grow: 1;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    background-color: var(--clr-surface-tonal-a0);
    overflow: auto;
}

/* Form Elements */
.input-panel, .results-panel {
    background-color: var(--clr-surface-a10);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--box-shadow);
}

.input-panel h2, .results-panel h2 {
    font-size: 1.2rem;
    margin-bottom: 1.2rem;
    color: var(--clr-primary-a20);
    border-bottom: 1px solid var(--clr-border);
    padding-bottom: 0.5rem;
}

.form-group {
    margin-bottom: 1rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--clr-text-secondary);
    font-size: 0.9rem;
}

input, select {
    width: 100%;
    padding: 0.6rem 0.8rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--clr-border);
    background-color: var(--clr-bg-input);
    color: var(--clr-text-primary);
    font-size: 1rem;
}

input:focus, select:focus {
    outline: none;
    border-color: var(--clr-primary-a30);
    box-shadow: 0 0 0 2px rgba(206, 238, 242, 0.25);
}

.time-range .range-inputs {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.time-range input {
    width: calc(50% - 1rem);
}

.time-range span {
    color: var(--clr-text-secondary);
}

.btn-primary {
    width: 100%;
    padding: 0.7rem 1rem;
    background-color: var(--clr-primary-a0);
    color: var(--clr-dark-a0);
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    transition: var(--transition);
    margin-top: 0.5rem;
}

.btn-primary:hover {
    background-color: var(--clr-primary-a20);
}

.btn-primary:active {
    background-color: var(--clr-primary-a30);
    transform: translateY(1px);
}

.btn-small {
    padding: 0.3rem 0.6rem;
    background-color: var(--clr-surface-a20);
    color: var(--clr-text-primary);
    border: 1px solid var(--clr-border);
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 0.9rem;
    transition: var(--transition);
}

.btn-small:hover {
    background-color: var(--clr-surface-a30);
}

/* Results Panel */
.no-results {
    color: var(--clr-text-secondary);
    font-style: italic;
    text-align: center;
    padding: 1rem;
}

.path-result {
    margin-bottom: 1rem;
}

.path-summary {
    background-color: var(--clr-surface-tonal-a10);
    padding: 1rem;
    border-radius: var(--border-radius);
    margin-bottom: 0.5rem;
    border-left: 4px solid var(--clr-primary-a20);
}

.path-details {
    margin-top: 1rem;
}

.edge-info {
    display: flex;
    align-items: center;
    padding: 0.5rem;
    margin: 0.3rem 0;
    background-color: var(--clr-surface-tonal-a10);
    border-radius: var(--border-radius);
    border-left: 3px solid var(--clr-primary-a0);
}

.path-not-found {
    color: var(--clr-error);
    text-align: center;
    padding: 1rem;
    background-color: rgba(255, 107, 107, 0.1);
    border-radius: var(--border-radius);
    margin: 0.5rem 0;
    border: 1px dashed var(--clr-error);
    font-weight: 500;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 60px;
}

/* Graph Visualization */
.graph-container {
    flex-grow: 1;
    background-color: var(--clr-bg-panel);
    border-radius: var(--border-radius);
    overflow: hidden;
    position: relative;
    box-shadow: var(--box-shadow);
    display: flex;
    flex-direction: column;
}

.graph-controls {
    display: flex;
    justify-content: space-between;
    padding: 0.8rem 1rem;
    background-color: var(--clr-surface-tonal-a10);
    border-bottom: 1px solid var(--clr-border);
}

.control-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.control-group label {
    margin-bottom: 0;
}

.view-options {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.view-options label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0;
    cursor: pointer;
}

#graphVisualization {
    flex-grow: 1;
    width: 100%;
    height: 100%;
    min-height: 400px;
}

/* Node and edge styles for D3 */
.node {
    fill: var(--clr-surface-a30);
    stroke: var(--clr-primary-a0);
    stroke-width: 2px;
    cursor: pointer;
    transition: fill 0.2s;
}

.node.source {
    fill: var(--clr-error);
    stroke: var(--clr-light-a0);
}

.node.target {
    fill: var(--clr-success);
    stroke: var(--clr-light-a0);
}

.node.path-node {
    fill: var(--clr-primary-a10);
    stroke: var(--clr-primary-a40);
}

.node-label {
    font-size: 12px;
    font-weight: bold;
    pointer-events: none;
    fill: var(--clr-text-primary);
}

.link {
    stroke: var(--clr-surface-a40);
    stroke-opacity: 0.6;
    stroke-width: 1.5;
}

.link.path-edge {
    stroke: var(--clr-primary-a20);
    stroke-opacity: 1;
    stroke-width: 3;
}

.edge-label {
    font-size: 10px;
    fill: var(--clr-text-secondary);
    pointer-events: none;
}

/* Timeline Container */
.timeline-container {
    background-color: var(--clr-bg-panel);
    border-radius: var(--border-radius);
    padding: 1rem;
    box-shadow: var(--box-shadow);
    scrollbar-color: var(--clr-primary-a20) var(--clr-surface-a40);
}

.timeline-container h3 {
    color: var(--clr-primary-a20);
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

#timeline {
    width: 100%;
    height: 120px;
    background-color: var(--clr-surface-tonal-a10);
    border-radius: var(--border-radius);
    position: relative;
    overflow-x: auto;
}

/* Loading Indicator */
#loading-indicator {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: none;
    justify-content: center;
    align-items: center;
    background-color: rgba(18, 18, 18, 0.8);
    z-index: 1000;
    flex-direction: column;
    gap: 1rem;
    color: var(--clr-primary-a40);
}

.spinner {
    width: 50px;
    height: 50px;
    border: 5px solid rgba(206, 238, 242, 0.2);
    border-radius: 50%;
    border-top-color: var(--clr-primary-a30);
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Responsive Design */
@media (max-width: 1024px) {
    .content-wrapper {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        border-right: none;
        border-bottom: 1px solid var(--clr-border);
    }
    
    .main-content {
        width: 100%;
    }
}

/* Tooltip styles */
.tippy-box {
    background-color: var(--clr-surface-a20);
    color: var(--clr-text-primary);
    border: 1px solid var(--clr-border);
    border-radius: var(--border-radius);
    padding: 0.5rem;
    font-size: 0.9rem;
    box-shadow: var(--box-shadow);
}

.tippy-arrow {
    color: var(--clr-surface-a20);
}

/* Edge hover effect */
.link:hover {
    stroke-width: 3;
    cursor: pointer;
}

/* Custom Checkbox Styling */
.view-options input[type="checkbox"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.view-options label {
    position: relative;
    padding-left: 28px; /* Space for custom checkbox */
    user-select: none;
    display: flex;
    align-items: center;
}

.view-options label::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: var(--checkbox-size);
    height: var(--checkbox-size);
    background-color: var(--clr-surface-a20);
    border: 2px solid var(--clr-surface-a40);
    border-radius: var(--checkbox-border-radius);
    transition: all 0.2s ease;
}

.view-options input[type="checkbox"]:checked + label::before {
    background-color: var(--clr-primary-a20);
    border-color: var(--clr-primary-a30);
}

.view-options input[type="checkbox"]:checked + label::after {
    content: '';
    position: absolute;
    left: 6px;
    top: 50%;
    transform: translateY(-50%) rotate(45deg);
    width: 6px;
    height: 10px;
    border: solid var(--clr-dark-a0);
    border-width: 0 2px 2px 0;
}

.view-options input[type="checkbox"]:focus + label::before {
    box-shadow: 0 0 0 2px rgba(206, 238, 242, 0.25);
}

.view-options input[type="checkbox"]:hover + label::before {
    border-color: var(--clr-primary-a10);
}

.view-options input[type="checkbox"]:hover:checked + label::before {
    background-color: var(--clr-primary-a30);
}

/* Animation for checkbox */
@keyframes checkbox-pop {
    0% { transform: translateY(-50%) scale(0.8); }
    50% { transform: translateY(-50%) scale(1.1); }
    100% { transform: translateY(-50%) scale(1); }
}

.view-options input[type="checkbox"]:checked + label::before {
    animation: checkbox-pop 0.3s ease;
}

/* Graph Editor Styles */
.graph-control-panel {
    background-color: var(--clr-bg-panel);
    border-radius: var(--border-radius);
    padding: 1rem;
    margin-top: 1.5rem;
    box-shadow: var(--box-shadow);
}

.graph-control-panel h2 {
    color: var(--clr-primary-a20);
    margin-bottom: 0.8rem;
    font-size: 1.3rem;
    border-bottom: 1px solid var(--clr-border);
    padding-bottom: 0.5rem;
}

.graph-control-buttons {
    display: flex;
    gap: 10px;
    margin-bottom: 1.5rem;
    justify-content: space-between;
}

.graph-control-buttons button {
    flex: 1;
    box-shadow: var(--box-shadow);
}

.editor-section {
    background-color: var(--clr-surface-tonal-a10);
    border-radius: var(--border-radius);
    padding: 0.8rem;
    margin-bottom: 1rem;
}

.editor-section h3 {
    color: var(--clr-primary-a10);
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.editor-section .form-group {
    margin-bottom: 0.5rem;
}

.editor-section input {
    width: 100%;
}

.editor-section .btn-primary {
    margin-top: 0.5rem;
    box-shadow: var(--box-shadow);
    width: 100%;
}

.btn-warning {
    background-color: var(--clr-warning);
    color: var(--clr-dark-a0);
    padding: 0.7rem 1rem;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    transition: var(--transition);
}

.btn-warning:hover {
    background-color: #e6bc5c;
}

.btn-warning:active {
    transform: translateY(1px);
}

.btn-secondary {
    background-color: var(--clr-surface-a30);
    color: var(--clr-text-primary);
    padding: 0.7rem 1rem;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    transition: var(--transition);
}

.btn-secondary:hover {
    background-color: var(--clr-surface-a40);
}

.btn-secondary:active {
    transform: translateY(1px);
}

/* Notification System */
.notification {
    position: fixed;
    bottom: 20px;
    right: 20px;
    padding: 15px 25px;
    border-radius: var(--border-radius);
    background-color: var(--clr-surface-a20);
    color: var(--clr-text-primary);
    box-shadow: var(--box-shadow);
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.3s, transform 0.3s;
    z-index: 1000;
    max-width: 300px;
}

.notification.success {
    background-color: var(--clr-success);
    color: var(--clr-dark-a0);
}

.notification.error {
    background-color: var(--clr-error);
    color: var(--clr-light-a0);
}

.notification.warning {
    background-color: var(--clr-warning);
    color: var(--clr-dark-a0);
}

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

.notification-close {
    margin-left: 10px;
    cursor: pointer;
    font-weight: bold;
}

/* Modal for Graph Editor */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    overflow-y: auto;
}

.modal-content {
    background-color: var(--clr-bg-panel);
    margin: 50px auto;
    width: 80%;
    max-width: 800px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    animation: modalFadeIn 0.3s ease;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.2rem;
    border-bottom: 1px solid var(--clr-border);
}

.modal-header h2 {
    color: var(--clr-primary-a20);
    margin: 0;
    font-size: 1.5rem;
}

.close-modal {
    color: var(--clr-text-secondary);
    font-size: 1.8rem;
    font-weight: bold;
    cursor: pointer;
    transition: var(--transition);
}

.close-modal:hover {
    color: var(--clr-error);
}

.modal-body {
    padding: 1.5rem;
    overflow-y: auto;
}

/* Ensure consistent button styling in the modal */
.modal-body .btn-warning,
.modal-body .btn-secondary,
.modal-body .btn-primary {
    box-shadow: var(--box-shadow);
    font-size: 1rem;
    text-align: center;
    display: block;
}

@keyframes modalFadeIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}